Spicule (nematode)

Spicule protruding from the spicular sheath at the posterior end of a male Eucoleus aerophilusMale caudal end of Capillaria plectropomi, with spinose spicular sheath and extruded spicule. Transmission electron microscopy.Left spicule in a male Pterygodermatites baiomydis

In nematodes (roundworms), spicules, or copulatory spicules, are needle-like mating structures found only in males.

Males nematodes may have one or two spicules, which serve to open the vulva of females, and facilitate the transmission of sperm, although sperm is not transferred directly by or through the spicules. The gubernaculum is another organ of the nematode male copulatory system, which guides the spicules during copulation.

单词	Copulatory spicule
释义	Copulatory spicule 英语百科 Spicule (nematode) In nematodes (roundworms), spicules, or copulatory spicules, are needle-like mating structures found only in males. Males nematodes may have one or two spicules, which serve to open the vulva of females, and facilitate the transmission of sperm, although sperm is not transferred directly by or through the spicules. The gubernaculum is another organ of the nematode male copulatory system, which guides the spicules during copulation.
随便看	Open reduction of open sacral fracture Open reduction of open shoulder dislocation Open reduction of open talus fracture Open reduction of open tarsal bone dislocation Open reduction of open tarsal bone fracture Open reduction of open traumatic hip dislocation Open reduction of open ulnar shaft fracture Open reduction of separated epiphysis of femur Open reduction of separated epiphysis of humerus Open reduction of separation of epiphysis Open reduction of spinal fracture Open reduction of sternum fracture Open reduction of temporomandibular dislocation open reduction with internal fixation open reed Open reel open reel instrumentation tape recorder Open reel tape open reel tape transport open regenerative cycle gas turbine Open region Open register open registration Open registry open registry countries

Copulatory spicule

Spicule (nematode)