HPRO 4412 Lecture Notes - Lecture 3: Human Sexual Response Cycle, Erection, Vaginal Lubrication

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First phase: excitement vasocongestion results in penile erection and vaginal lubrication. Men have a refractory period and they fall asleep right after sex. Vagina, uterus, during sexual response cycle: excitement phase , plateau phase Inner two thirds of vagina expands and lengthens: uterus fully elevated, clitoris retracts under hood c, outer third of vagina forms orgasmic platform, inner labia increases in size and turn bright red, uterus contracts, orgasm phase, resolution phase. Briefest phase, characterized by muscle spasm, ejaculation in males, vaginal and uterine contraction in females. The final phase: resolution: the sexual system returns to its un-aroused state. The word hormone was coined in 1905 by ernest starling and comes from a greek word ormao that means to excite or arouse . Chemical messengers released by endocrine orgns and carried throughout the body via the circulatory system. Differentiate occurs during the seventh week after. Hormones chemical substance secreted by the endocrine glands into the bloodstream.

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