01:119:116 Lecture Notes - Lecture 14: Vas Deferens, Ejaculatory Duct, Bulbourethral Gland
15 Mar 2016
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Document Summary
Identical clones: mitosis (no meosis, no fusion of gametes, various methods. Small part of parents body buds off. Parent several pieces produces missing parts. Egg female (=ovum) large and nonmodile. Reproductive handicap of sex fig 46. 3: advantages. Allow pop to rid itself of harmful genes. Reproductive cycles: cycles of reproductive activity. Environmental cues trigger hormonal secretion: offspring produced only when environment is suitable for survival. Problem - migration hasn"t changed: triggered by day length. Avg # of caribou offspring declined by 75: cycles in animals. Hermaphroditism: each individual has both male and female reproductive systems, some self fertilize. Largest and oldest change from female to male. Harem - lots of females one male (cid:1) Needs to be 1-2 degrees cooler than body. Sperm travel from epididymis through vas deferens. Passes though prostate gland and joins with urethra. 1st glands to deposit secretions into urethra at time of arousal. Bulbourethral fluid: mucus neutralize urine in urethra.
