Well, they aren't. The penis, scrotum and clitoris (females) are the only sexual structures outside the body. Of these, the only reproductive structure is inside the scrotum, and yes, it is best outside the body because sperm will die if not kept cool. But all female reproductive organs are inside the body.
Dogs and humans are unique in having prostates compared to other animals because they are the only species that have a prostate gland that surrounds the urethra. This gland plays a role in reproductive function and is important for the production of seminal fluid.
gametes
Animals and humans differ in their sexual behaviors and reproductive systems. Animals typically have specific mating seasons and behaviors, while humans can engage in sexual activity at any time. Additionally, animals often have physical differences in their reproductive organs and mating rituals compared to humans.
Humans have permanent breasts because they are a key part of the female reproductive system, providing nourishment for infants through breastfeeding.
Plants benefit humans by providing oxygen, improving air quality, reducing stress, and offering medicinal properties that can help with various health issues.
Reproductive conflict and the separation of reproductive generations in humans
they benefit humans by eating chicken breats
Almost all plants benefit humans
Humans are mammals
In humans a male reproductive cell is the sperm, while the female reproductive cell is the egg.
Like humans, most animals are either male or female, although some are hermaphroditic, having reproductive characteristics of both genders.
Yes.
I think it is the same as humans.
A Pig
It can have sex with its self and have babies and can fertilize its own egg.
Not really. In symbiosis, each partner derives benefit from the partnership. While rats benefit from humans, humans do not benefit from rats.
Dogs and humans are unique in having prostates compared to other animals because they are the only species that have a prostate gland that surrounds the urethra. This gland plays a role in reproductive function and is important for the production of seminal fluid.