A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction.The reproductive organs together constitute the reproductive system.In animals, the testis in the male, and the ovary in the female, are called the primary sex organs. The body of a rotifer is divided into a head, trunk, and foot, and is typically somewhat cylindrical. Primarily nocturnal, scorpions often Insect morphology is the study and description of the physical form of insects.The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. Although diverse, insects are quite similar in overall design, internally and externally. Three physical features separate insects from other arthropods: they have a body divided into three regions (called tagmata) (head, thorax, and abdomen), have three pairs They have a gonopore on the ventral cephalothorax, and the copulation is direct as male Opiliones have a penis, unlike other arachnids. The name urchin is an old word for hedgehog, which sea urchins resemble; they have archaically been called sea Typical body length does not exceed 7 mm (0.28 in), and some species are smaller than 1 mm, although the largest known species, Trogulus torosus ( Trogulidae ), grows as long as 22 mm (0. The ink gland and its associated ink sac empties into the rectum close to the anus, allowing the squid to rapidly discharge black ink into the mantle cavity and surrounding water. A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction.The reproductive organs together constitute the reproductive system.In animals, the testis in the male, and the ovary in the female, are called the primary sex organs. Examples: The sperm is sometimes packaged in spermatophores and is released through male gonopores that open, often temporarily, on the underside of the animal, roughly two-thirds of the way along the body. All planaria are hermaphrodites, meaning individual animals have both female and male reproductive parts at the same time. The genital atrium is a common chamber for male and female genital apertures, it opens externally by a gonopore lying ventrally in front of the acetabulum. Examples: Sea hares, Aplysia, Petalifera, Notarchus, Bursatella, Akera. (iv) Gill and osphradium on the right side of the body. Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia.These filter-feeding organisms are known chiefly from fossils found from the Middle Cambrian (Miaolingian, Wuliuan) through the Lower Carboniferous (Mississippian). Notaspidea: (i) Shell may or may not be present. The timing of the origin of ticks is uncertain, though the An octopus (PL: octopuses,octopi, or octopodes, see below for variants) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ k t p d /, ok-TOP--d).The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a They serve as openings for the scorpion's respiratory organs, known as book lungs. The cirrus can be everted through the gonopore during copulation. (iii) Gill bipectinate type. They have a rigid, usually spherical body bearing moveable spines, which gives the class the name Echinoidea (from the Greek ekhinos 'spine'). scorpion, (order Scorpiones or Scorpionida), any of approximately 1,500 elongated arachnid species characterized by a segmented curved tail tipped with a venomous stinger at the rear of the body and a pair of grasping pincers at the front. The timing of the origin of ticks is uncertain, though the The 7th sternum is boat-shaped in females, and it forms a brood or genital pouch with the 8th and 9th sterna. A possible early graptolite, Chaunograptus, is known from the Middle Cambrian. Examples: Rotifers have bilateral symmetry and a variety of different shapes. Squid distract attacking predators by ejecting a cloud of ink, giving themselves an opportunity to escape. The insect is made up of three main body regions (tagmata), the head, thorax and abdomen. They serve as openings for the scorpion's respiratory organs, known as book lungs. The male has four testes; a short vas deferens arises from the testes and joins a seminal vesicle which enters a penis, the opens by a gonopore below the acetabulum. The sperm is sometimes packaged in spermatophores and is released through male gonopores that open, often temporarily, on the underside of the animal, roughly two-thirds of the way along the body. American paddlefish are among the largest and longest-lived freshwater fishes in North America. They have a shark-like body, average 1.5 m (4.9 ft) in length, weigh 27 kg (60 lb), and can live in excess of thirty years. The ink is a suspension of melanin particles and quickly disperses to form a dark cloud that They have a gonopore on the ventral cephalothorax, and the copulation is direct as male Opiliones have a penis, unlike other arachnids. Examples: An octopus (PL: octopuses,octopi, or octopodes, see below for variants) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ k t p d /, ok-TOP--d).The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a An octopus (PL: octopuses,octopi, or octopodes, see below for variants) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ k t p d /, ok-TOP--d).The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a The ink gland and its associated ink sac empties into the rectum close to the anus, allowing the squid to rapidly discharge black ink into the mantle cavity and surrounding water. : Opiliones 6,600 4 Three physical features separate insects from other arthropods: they have a body divided into three regions (called tagmata) (head, thorax, and abdomen), have three pairs Urchins typically range in size from 3 to 10 cm (1 to 4 in), although the largest species can reach up to 36 cm (14 in). Squid distract attacking predators by ejecting a cloud of ink, giving themselves an opportunity to escape. Although scorpions are most common and diverse in deserts, they also live in many other habitats. Insect morphology is the study and description of the physical form of insects.The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. According to studies, Monogenea is one of the oldest groups in the phylum Platyhelminthes having evolved from Turbellarians over 100 million years ago.. While many of the species in the group share a number of morphological characteristics, such as a flattened body and being small in size, Monogeneans are divided into two major groups which include monopisthocotyleans, The female has an elongated ovary above the point where the intestine caeca rejoin, from the ovary an oviduct passes in front. The 7th sternum is boat-shaped in females, and it forms a brood or genital pouch with the 8th and 9th sterna. Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia.These filter-feeding organisms are known chiefly from fossils found from the Middle Cambrian (Miaolingian, Wuliuan) through the Lower Carboniferous (Mississippian). All species lay eggs . The insect is made up of three main body regions (tagmata), the head, thorax and abdomen. The anatomy of spiders includes many characteristics shared with other arachnids.These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed.. Spiders also have several adaptations that distinguish them from The body of a rotifer is divided into a head, trunk, and foot, and is typically somewhat cylindrical. : Opiliones 6,600 4 Insect physiology includes the physiology and biochemistry of insect organ systems.. All planaria are hermaphrodites, meaning individual animals have both female and male reproductive parts at the same time. Ticks are external parasites, living by feeding on the blood of mammals, birds, and sometimes reptiles and amphibians. The genital atrium is a common chamber for male and female genital apertures, it opens externally by a gonopore lying ventrally in front of the acetabulum. A copulatory organ on the tail collects the sperm and transfers it to the partner's seminal receptacle through the female gonopore. [pages needed] All others are called secondary sex organs, divided between the external sex organsthe The genital atrium is a common chamber for male and female genital apertures, it opens externally by a gonopore lying ventrally in front of the acetabulum. The ventral side of somite 1 has a pair of genital opercula covering the gonopore. The female has an elongated ovary above the point where the intestine caeca rejoin, from the ovary an oviduct passes in front. The next four somites, 3 to 6, all bear pairs of spiracles. All species lay eggs . Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes.Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". All species lay eggs . scorpion, (order Scorpiones or Scorpionida), any of approximately 1,500 elongated arachnid species characterized by a segmented curved tail tipped with a venomous stinger at the rear of the body and a pair of grasping pincers at the front. (v) The male gonopore is situated at the base of the right rhinophore. Primarily nocturnal, scorpions often Although diverse, insects are quite similar in overall design, internally and externally. The insect is made up of three main body regions (tagmata), the head, thorax and abdomen. Three physical features separate insects from other arthropods: they have a body divided into three regions (called tagmata) (head, thorax, and abdomen), have three pairs A possible early graptolite, Chaunograptus, is known from the Middle Cambrian. The timing of the origin of ticks is uncertain, though the While many of the species in the group share a number of morphological characteristics, such as a flattened body and being small in size, Monogeneans are divided into two major groups which include monopisthocotyleans, Both male and female cockroaches have ten segments in their abdomen. Urchins typically range in size from 3 to 10 cm (1 to 4 in), although the largest species can reach up to 36 cm (14 in). Primarily nocturnal, scorpions often Urchins typically range in size from 3 to 10 cm (1 to 4 in), although the largest species can reach up to 36 cm (14 in). Squid distract attacking predators by ejecting a cloud of ink, giving themselves an opportunity to escape. (ii) Mantle present but without mantle cavity. There is a well-developed cuticle, which may be thick and rigid, giving the animal a box-like shape, or flexible, giving the animal a worm-like shape; such rotifers are respectively called loricate and illoricate. [pages needed] All others are called secondary sex organs, divided between the external sex organsthe The female has an elongated ovary above the point where the intestine caeca rejoin, from the ovary an oviduct passes in front. Photo source: wiki Although diverse, insects are quite similar in overall design, internally and externally. Both parts share a single opening called gonopore, which is located on the ventral side of the posterior half of the body. Both parts share a single opening called gonopore, which is located on the ventral side of the posterior half of the body. Although scorpions are most common and diverse in deserts, they also live in many other habitats. Typical body length does not exceed 7 mm (0.28 in), and some species are smaller than 1 mm, although the largest known species, Trogulus torosus ( Trogulidae ), grows as long as 22 mm (0. The head comprises six fused segments with compound eyes, ocelli, antennae and mouthparts, which differ according (iv) Gill and osphradium on the right side of the body. There is a well-developed cuticle, which may be thick and rigid, giving the animal a box-like shape, or flexible, giving the animal a worm-like shape; such rotifers are respectively called loricate and illoricate. (ii) Mantle present but without mantle cavity. The ventral side of somite 1 has a pair of genital opercula covering the gonopore. The cirrus or penis, seminal vesicle and prostatic glands are surrounded in a common cirrus sheath or cirrus sac. Sternite 2 forms the basal plate bearing the pectines, which function as sensory organs. Insect physiology includes the physiology and biochemistry of insect organ systems.. According to studies, Monogenea is one of the oldest groups in the phylum Platyhelminthes having evolved from Turbellarians over 100 million years ago.. Notaspidea: (i) Shell may or may not be present. Although scorpions are most common and diverse in deserts, they also live in many other habitats. The 7th sternum is boat-shaped in females, and it forms a brood or genital pouch with the 8th and 9th sterna. The anatomy of spiders includes many characteristics shared with other arachnids.These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed.. Spiders also have several adaptations that distinguish them from Order 5. (iv) Gill and osphradium on the right side of the body. Examples: Sea hares, Aplysia, Petalifera, Notarchus, Bursatella, Akera. scorpion, (order Scorpiones or Scorpionida), any of approximately 1,500 elongated arachnid species characterized by a segmented curved tail tipped with a venomous stinger at the rear of the body and a pair of grasping pincers at the front. They have a rigid, usually spherical body bearing moveable spines, which gives the class the name Echinoidea (from the Greek ekhinos 'spine'). A copulatory organ on the tail collects the sperm and transfers it to the partner's seminal receptacle through the female gonopore. American paddlefish are among the largest and longest-lived freshwater fishes in North America. A possible early graptolite, Chaunograptus, is known from the Middle Cambrian. The cirrus or penis, seminal vesicle and prostatic glands are surrounded in a common cirrus sheath or cirrus sac. The next four somites, 3 to 6, all bear pairs of spiracles. Order 5. : Solifugae 1,100 : Opiliones 6,600 4 According to studies, Monogenea is one of the oldest groups in the phylum Platyhelminthes having evolved from Turbellarians over 100 million years ago.. They serve as openings for the scorpion's respiratory organs, known as book lungs. Photo source: wiki Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia.These filter-feeding organisms are known chiefly from fossils found from the Middle Cambrian (Miaolingian, Wuliuan) through the Lower Carboniferous (Mississippian). Both male and female cockroaches have ten segments in their abdomen. Both male and female cockroaches have ten segments in their abdomen. They have a rigid, usually spherical body bearing moveable spines, which gives the class the name Echinoidea (from the Greek ekhinos 'spine'). For most populations the median age is five to eight years and the maximum age is fourteen to eighteen years. Insect physiology includes the physiology and biochemistry of insect organ systems.. The front half of the pouch contains the female gonopore, spermathecal pores, and collateral glands. Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes.Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". (v) The male gonopore is situated at the base of the right rhinophore. The sperm is sometimes packaged in spermatophores and is released through male gonopores that open, often temporarily, on the underside of the animal, roughly two-thirds of the way along the body. The cirrus or penis, seminal vesicle and prostatic glands are surrounded in a common cirrus sheath or cirrus sac. All planaria are hermaphrodites, meaning individual animals have both female and male reproductive parts at the same time. The next four somites, 3 to 6, all bear pairs of spiracles. Sternite 2 forms the basal plate bearing the pectines, which function as sensory organs. The front half of the pouch contains the female gonopore, spermathecal pores, and collateral glands. Sternite 2 forms the basal plate bearing the pectines, which function as sensory organs. Examples: Sea hares, Aplysia, Petalifera, Notarchus, Bursatella, Akera. For most populations the median age is five to eight years and the maximum age is fourteen to eighteen years. (iii) Gill bipectinate type. Ticks are external parasites, living by feeding on the blood of mammals, birds, and sometimes reptiles and amphibians. [In this image] Planarian reproductive system. They have a shark-like body, average 1.5 m (4.9 ft) in length, weigh 27 kg (60 lb), and can live in excess of thirty years. The body of a rotifer is divided into a head, trunk, and foot, and is typically somewhat cylindrical. : Solifugae 1,100 The front half of the pouch contains the female gonopore, spermathecal pores, and collateral glands. They have a gonopore on the ventral cephalothorax, and the copulation is direct as male Opiliones have a penis, unlike other arachnids. The head comprises six fused segments with compound eyes, ocelli, antennae and mouthparts, which differ according American paddlefish are among the largest and longest-lived freshwater fishes in North America. The cirrus can be everted through the gonopore during copulation. The head comprises six fused segments with compound eyes, ocelli, antennae and mouthparts, which differ according Both parts share a single opening called gonopore, which is located on the ventral side of the posterior half of the body. The name urchin is an old word for hedgehog, which sea urchins resemble; they have archaically been called sea Notaspidea: (i) Shell may or may not be present. Typical body length does not exceed 7 mm (0.28 in), and some species are smaller than 1 mm, although the largest known species, Trogulus torosus ( Trogulidae ), grows as long as 22 mm (0. They have a shark-like body, average 1.5 m (4.9 ft) in length, weigh 27 kg (60 lb), and can live in excess of thirty years. The name urchin is an old word for hedgehog, which sea urchins resemble; they have archaically been called sea (iii) Gill bipectinate type. [In this image] Planarian reproductive system. The age of American paddlefish is best [pages needed] All others are called secondary sex organs, divided between the external sex organsthe The age of American paddlefish is best The anatomy of spiders includes many characteristics shared with other arachnids.These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed.. Spiders also have several adaptations that distinguish them from For most populations the median age is five to eight years and the maximum age is fourteen to eighteen years. The ventral side of somite 1 has a pair of genital opercula covering the gonopore. Rotifers have bilateral symmetry and a variety of different shapes. The ink is a suspension of melanin particles and quickly disperses to form a dark cloud that (v) The male gonopore is situated at the base of the right rhinophore. The ink gland and its associated ink sac empties into the rectum close to the anus, allowing the squid to rapidly discharge black ink into the mantle cavity and surrounding water. The ink is a suspension of melanin particles and quickly disperses to form a dark cloud that Rotifers have bilateral symmetry and a variety of different shapes. A copulatory organ on the tail collects the sperm and transfers it to the partner's seminal receptacle through the female gonopore. [In this image] Planarian reproductive system. The male has four testes; a short vas deferens arises from the testes and joins a seminal vesicle which enters a penis, the opens by a gonopore below the acetabulum. While many of the species in the group share a number of morphological characteristics, such as a flattened body and being small in size, Monogeneans are divided into two major groups which include monopisthocotyleans, Insect morphology is the study and description of the physical form of insects.The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. (ii) Mantle present but without mantle cavity. Photo source: wiki Ticks are external parasites, living by feeding on the blood of mammals, birds, and sometimes reptiles and amphibians. A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction.The reproductive organs together constitute the reproductive system.In animals, the testis in the male, and the ovary in the female, are called the primary sex organs. Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes.Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". The male has four testes; a short vas deferens arises from the testes and joins a seminal vesicle which enters a penis, the opens by a gonopore below the acetabulum. The cirrus can be everted through the gonopore during copulation. Order 5. : Solifugae 1,100 There is a well-developed cuticle, which may be thick and rigid, giving the animal a box-like shape, or flexible, giving the animal a worm-like shape; such rotifers are respectively called loricate and illoricate. The age of American paddlefish is best
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