A Visual Introduction to Human Anatomy

Use the Visible Body Learn Site’s text, illustrations, and animations to learn and communicate basic human biology concepts. Enjoy!

Structures of the male reproductive system

Male Reproductive Structures: Anatomy and Function of the Male Genitalia

The male reproductive system is responsible for delivering sperm to the female reproductive system. How does it do that? Find out how spermatogenesis works and which ducts and glands are key to delivering the sperm once it’s been generated.

Embryonic structures in the womb

Reproductive Processes: Fertilization, Fetal Development, and Birth

What happens to change an oocyte into a zygote, a zygote into an embryo, an embryo into a fetus, and a fetus into a baby? Learn what’s going on behind the scenes during conception and pregnancy.