title: The clasper-siphon sac mechanism in Squalus acanthias and Mustelus canis.
mesh_terms: D000375:Aging; D000818:Animals; D003307:Copulation; D004558:Electric Stimulation; D005837:Genitalia, Male / Q000033:anatomy & histology / Q000166:cytology / Q000254:growth & development / Q000378:metabolism / Q000502:physiology; D008297:Male; D010057:Oviducts; D012623:Seawater; D012726:Sexual Behavior, Animal; D012754:Sharks / Q000033:anatomy & histology / Q000254:growth & development / Q000502:physiology*; D013045:Species Specificity