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Sex and Your Body Chapter Five.

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Presentation on theme: "Sex and Your Body Chapter Five."— Presentation transcript:

1 Sex and Your Body Chapter Five

2 Female Sex Organs External Female Genitals (Vulva)
Mons pubis Labia majora Labia minora Prepuce Clitoris Internal Female Genitals Vagina Uterus Cervix Ovaries Fallopian tube

3 External Female Genitalia
Mons Pubis Prepuce Labia Majora Clitoris Urethral Opening Labia Minora Vaginal Opening

4 Figure 5.1 The female sex organs
Insert Figure 5-1 The Female sex organs

5 Male Sex Organs Circumcision Penis Scrotum The glans Corpus spongiosum
Urethra Scrotum Function: Allows for sperm development at a temperature cooler than the body (93.6 degrees F) Testes (with seminiferous tubules) Epididymis Vas deferens Prostate gland Cowper’s glands Seminal vesicles Circumcision

6 Male External Genitalia

7 Figure 5.2 The male sex organs
Insert Figure 5-2 The male sex organs

8 Hormones and The Reproductive Life Cycle
Sex Hormones Adrenal cortex produces androgens = Sex hormones Testes produce testosterone Ovaries produce estrogen and progesterone Pituitary gland produces LH and FSH Hypothalamus (controls the release of hormones from pituitary)

9 Differentiation of the Embryo
Determined by the fertilizing sperm at the time of conception Conception - combining of 23 pairs of chromosomes Of the 23 pairs, one pair = sex chromosomes Egg carries an X sex chromosome Sperm carries either a X or Y chromosome XX provides the blueprint to produce a female XY provides the blueprint to produce a male

10 Female Sexual Maturation
Physical changes begins around 8-13 with breast development and rapid body growth between 9 and 15. The 4 Phases of the Menstrual Cycle Menses Days 1-5 Estrogenic phase Days 6-13 Ovulation phase Day 14 Progestational phase Days 15-27

11 Figure 5.4 The menstrual cycle

12 Menstrual Problems Dysmenorrhea Premenstrual Tension (PT)
Cramps, bloating, nausea associated with the menstrual cycle Some symptoms caused from prostaglandins Premenstrual Tension (PT) Premenstrual syndrome (PMS) Premenstrual dysphoric disorder (PMDD) Pharmacological treatment Lifestyle changes to reduce symptoms Limit salt intake Exercise Don’t use alcohol or tobacco Eat a nutritious diet Relax

13 Male Sexual Maturation
Normally occurs 2 years later than girls Begins about 10 or 11 years old Physical changes Testicular growth Penis growth Pubic hair growth Voice deepens Increase in height

14 Aging and Human Sexuality
Women: Menopause Ovaries gradually cease functioning Stop ovulating Decreasing estrogen levels Increased risk of disease Men Gradual decrease of testosterone Loss of energy/sex drive/stamina

15 Sexual Response Cycle Four phases typically characterize the sexual response cycle: Excitement phase Penis becomes erect, testes expand and pulled upward Clitoris, labia and vaginal walls also vasocongested, vaginal lubrication Plateau phase Extension of excitement; everything becomes more pronounced than in excitement phase; male pre-ejaculatory emission Orgasmic phase Rhythmic contractions along male duct system, expelling semen; contractions in vagina and uterus Males (refractory phase) Resolution phase Reversal of excitement phase; all structures return to unstimulated state

16 1: Excitement phase Everything elevates!

17 1: Excitement Phase Tenting = body of the uterus begins to ascend

18  2: Plateau Phase Pre-ejaculatory emission from Cowper’s gland

19   2: Plateau Phase

20   3: Orgasmic Phase

21 4: Resolution phase System returns to normal

22 Sexual Problems Biological conditions affecting women: Vaginitis
Characterized by vaginal discharge, vaginal irritation, pain during intercourse Vaginismus uncontrolled, involuntary spasm of the vagina muscles Endometriosis Pelvic Inflammatory Disease (PID) 50-75% of PID cases are caused by STDs Biological conditions affecting men: Prostatitis (acute vs. chronic) Acute usually due to a bacterial/viral infection inflammation of the prostate gland, often resulting in swelling or pain, urination problems, sexual dysfunction, etc. Testicular cancer Most common in men in their twenties and thirties

23 Sexual Dysfunctions Common sexual dysfunctions Treatment Male –
Erectile dysfunction Premature ejaculation Delayed ejaculation Women – Orgasmic dysfunction Treatment Physical examination Pharmaceutical Relaxation and massage techniques

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