But lots of families have their own name for genitals such as private parts. Our reproductive systems do a brilliant job of making the sex cells an egg or a sperm, but when, why and how do these ...

sperm, eggs, nerve cells, muscle cells, ciliated cells, and villi. Get it, lark? Anyone…? Okay let's move on. An animal cell is made of three main parts a nucleus, cell membrane and cytoplasm ...

which could substantially advance research on germ cells. Future research could allow scientists to create sperm and eggs from skin, blood and other human body parts and fertilize eggs with sperm ...