Chap 45 notes

Chap 45 notes - Chapter 45 Spermatogenesis Fig 49-5 Sperm...

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Chapter 45 Spermatogenesis Fig 49-5 Sperm Structure (Fig 49-6) Conducting Ducts * Sperm moves from seminiferous tubules to epididymis and vas deferens * sperm maturation and storage * Ejaculation of sperm from vas deferens * to ejaculatory duct * into urethra (through penis) * Release from body Accessory Glands * Sperm mix with semen in the conducting tubes: * about 200 million sperm per ejaculation * Mix with secretions from seminal vesicles * fructose (energy for sperm) and prostaglandins (stimulate contractions of uterus) * And prostate gland * Alkaline fluid containing Ca2+, citric acid and enzymes (neutralizes acidity in vagina, increases sperm motility) * Bulbourethral glands * release mucous secretion for easier vaginal penetration The Penis * Three columns of erectile tissue * 2 cavernous bodies * 1 spongy body (surrounds urethra) * Erectile tissue engorges with blood penis becomes erect * Parasympathetic neurons dilate arteries in penis * NB: viagra (that little blue pill that blocks enzyme that sustains erection!) * Tip called glans, covered by foreskin
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This note was uploaded on 01/24/2012 for the course 832 335 taught by Professor Abruzzi during the Spring '10 term at Rutgers.

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Chap 45 notes - Chapter 45 Spermatogenesis Fig 49-5 Sperm...

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