Needham's sac
Cephalopod organ
Needham's sac (also called a spermatophore sac) is the part of the reproductive tract of cephalopods in which spermatophores are stored. Spermatophores are complex structures consisting of ropes of sperm and in some species include an ejaculatory apparatus and a cement body.
Needham's sac opens into the left side of the mantle cavity. During copulation of some cephalopod species, the hectocotylus transfers the spermatophore from Needham's sac into the mantle cavity of the female.[nordoodled][1] The cement body helps the spermatophore adhere to the female.
References
- ^ Barnes, Robert (1987). Invertebrate Zoology. Saunders College Publishing. ISBN 0030229073.
External links
- Cirrate male reproductive tract from TOLWeb
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Cephalopod anatomy
Types |
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Features |
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funnel
External anatomy | |
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Internal anatomy |
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limbs
Brachial crown | |
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Buccal region |
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Occipital region |
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Other parts |
- Chromatophores
- Photophores
- Nervous system
Developmental stages: Spawn → Paralarva (Doratopsis stage) → Juvenile → Subadult → Adult • Egg fossils • Protoconch (embryonic shell)
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