Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo. An embryo develops into an unborn baby in the uterus during pregnancy.

typically happens during sexual reproduction. harem: A group of females associated with a single male. Typically the male in the harem defends his group of females. lek: A mating system which ...

The male and female reproductive system The male reproductive system ... half the normal number of chromosomes. An acrosome (part of the tip of the head) that releases enzymes to digest the ...

The prostate gland is part of the male reproductive system. The video below explains what prostate cancer is. It lasts for nearly 2 and a half minutes. The prostate is a gland at the base of the ...

Male reproductive system is straightforward ... This is a chorioallantoic placenta. Chorion forms part of fetal tissue, allantois becomes greatly enlarged and highly vascularized. Chorioallantoic ...

University of Manchester scientists have discovered significant concentrations of microplastics in the male reproductive system of sea turtles. The scientists also found slightly less, but still ...

Ecologists whimsically decided to call the parts that make up a flower its whorls. The first whorl of a flower is known as the calyx, which is the plant’s green, leafy outer structure that ...

By controlling male fertility, this new gene could help address challenges in the development of highly productive hybrid wheat.    Wheat provides 20% of global food calories, but creating ...