Carbon dioxide is used to build sugars. I think it's the only one
great question ! i guess they don't, since we don't see air. And air is kinda like water for them, so I'd say no they don't see water.
Answer:
Sperm
Egg
Eyegote
Vulva
The male reproductive system consists of external organs. The testes in the scrotum produce the male gamete, sperm, which is ejaculated in seminal fluid by the penis. The female reproductive system primarily consists of internal organs.
