What is the difference between a sperm cell and an egg cell? LH triggers the ovaries to release the egg, while higher blood estrogen levels stimulate the vaginal membrane to secrete glycogen, which is then metabolized to lactate. Diagram of a human spermatozoon. Sperm and Female sperm storage. How many chromosomes does a human sperm cell contain? Sea urchin sperm move their tails using a helical motion, as shown here in this animation. They can be caused by defects during spermatogenesis sperm productionor by alterations acquired during the sperm maturation process and pathway until the sperms come out with ejaculation.
Echinoderms - Fertilization