NATS 1675 Lecture 2: Male repro. system

• School: York University
• Department: Natural Science
• Course: NATS 1675
• Professor: Jill Lazenby

Document Summary

Gametes combine to form a new life. Each cell has 46 chromosomes after division. Only occurs in the gonads (ovaries or testes) Only occurs to produce sperm or eggs. Meiosis 1 duplicated homologous pair line up to form tetrads and exchange some genetic material, then separate (reduction division) Protect and nourish developing embryo and fetus. Transport of menstrual uid out of the body. Male reproductive system: paired testes in the scrotum, epididymis stores maturing sperm, sperm travel through the vas deferens to the ejaculatory duct, the ejaculatory ducts enter the urethra. Produce a fluid that nourishes sperm, and assists movement of sperm once in the female reproductive tract. Produces alkaline secretions that activate sperm and reduce the acidity of the male and female reproductive system. Produce a mucous secretion before ejaculation that neutralizes acidic urine in the urethra. Contribute secretions that make the seminal fluid gelatinous, and lubricate the penis for intercourse. Fructose as an energy source for sperm.