egg cells

• egg cells or ova are female gametes in animals
• an egg cell is one of the largest cells in human body, and is approximately 0.12mm in diameter
• it contains nucleus which houses genetic material
• the zona pellucida is out protective layer/membrane of the egg
• attached to this is the corona radiate, which consists of two or three layers
• corona radiata function

  to supply proteins needed by fertilised egg
• egg cell carried genetic information from female in haploid nucleus
• zona pellucida stops more than one sperm getting in
• label the egg cell

  A) corona radiata

  B) zona pellucida

  C) cortical granule