acrosome
/ˈækrəˌsoʊm/
noun
- A structure at the tip of a sperm cell that contains enzymes to help it penetrate an egg during fertilization.
- Under the microscope, the acrosome looks like a small cap on the sperm's head.
- A healthy acrosome is essential for successful fertilization.
- The acrosome releases enzymes that digest the egg's protective layer.