sperm sac造句

• Males secrete a sperm sac, which is transferred to the female.
• Tiny projections called papillae protrude from the back walls of the male's sperm sacs into his cloaca.
• The victorious male then mates with females by grabbing them with their tentacles, turning the female so that the two animals are face-to-face, then using a specialized tentacle to insert sperm sacs into an opening near the female's mouth.
• Eventually, the larger male cuttlefish mate with the females by grabbing them with their tentacles, turning the female so that the two animals are face-to-face, then using a specialized tentacle to insert sperm sacs into an opening near the female's mouth.
• It differs from the other genera in Aglajidae by its external cylindrical body form with small parapodia, the shape of its small, curved and strongly calcified shell, its alimentary canal with a rigid, non-eversible buccal bulb, and the reproductive system with a short duct to the exogenous ( = originating from the outside ) sperm sac and a characteristic penis.