Reproductive system three Differences from humans and American lobster
1) Mating: In humans, mating usually occurs through internal fertilization where sperm is deposited directly into the female reproductive tract. However, American lobsters practice external fertilization. During mating, the male lobster deposits sperm onto the female's reproductive organs, known as seminal receptacles, which are located on the underside of the female's tail.
2) Gamete production: Humans produce both eggs and sperm within their reproductive system. In females, eggs develop within the ovaries, while in males, sperm is produced in the testes. On the other hand, American lobsters exhibit separate sexes, meaning that an individual lobster is either male or female. Females have a pair of ovaries where they produce eggs, while males have a pair of testes where sperm is produced.
3) Reproductive structures: The reproductive structures also differ between humans and American lobsters. In humans, females have a uterus where fertilized eggs implant and develop into embryos. The male has a through which sperm is transferred during sexual intercourse. In contrast, American lobsters have a pair of female gonopores located on the sternum, through which they receive sperm from the male. Males have a pair of gonopods, which are specialized appendages for transferring sperm into the female's reproductive organs.