Biology B2 Egg cells -structure and function

The egg cell also known as the ovum , the female reproductive cell.

The egg cells is released from the ovaries in the female reproductive system.

The outermost layer surrounding the egg cell and consists of follicular cells . these cells play a role in nourishing and protecting the egg.

It is the thick , transparent and non - cellular layer located beneath the corona radiata. It is composed of glycoproteins and provides structural support for the egg

It is the innermost layer which is a thin transparent membrane secreted by the egg cell. The Vitelline membrane provides additional protection to the egg.

It is to combine with sperm cells during fertilization , forming a zygote. carrying half of the genetic material to form a new individual. Being rich in cytoplasmic components such as yolk which provide nutrients for the developing embryo. Creating the right environment for fertilisation by the sperm.

• It is usually released every cycle . Most women release an egg every cycle - Ovulation. • You are born with all your egg cells. • The quality of human egg gets worse over time. • The female egg cell is bigger than you think. • The female egg cell has a short life after ovulation.