HSCI 100 Lecture Notes - Lecture 21: Seminiferous Tubule, Bulbourethral Gland, Glans Penis
Body cells=somatic cells: each body cell has 46 chromosomes (23 pairs) within the nucleus and divide by mitosis only, cells that have pairs of chromosomes are called diploid (2n) Germ cells in gonads develop into gametes in specialized compartments with support cells. Spermatogenesis: process of making sperm in males, from meiosis, all 4 haploid cells generate sperm, a continual process after puberty, about 400 million sperm are produced per day. Seminal vesicle- one of a pair of glands that produce a fluid that nourishes sperm, thickens semen & assists movement of sperm once in the female. Vas deferens- one of a pair of ducts that transport sperm from the epididymis to the urethra. Urethra- a tube that transports semen during ejaculation, and urine at other times. Erectile tissue of penis- spongy connective tissue that fills with blood during sexual arousal, causing erection of the penis. Penis- organ of sexual intercourse & urination.