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Chapter Five Sex and Your Body. Female Sex Organs 2 External Female Genitals (Vulva) External Female Genitals (Vulva) – Mons pubis – Labia majora – Labia.

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Presentation on theme: "Chapter Five Sex and Your Body. Female Sex Organs 2 External Female Genitals (Vulva) External Female Genitals (Vulva) – Mons pubis – Labia majora – Labia."— Presentation transcript:

1 Chapter Five Sex and Your Body

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

3 Figure 5.1 The female sex organs 3

4 Male Sex Organs 4 Penis The glans Corpus spongiosum Urethra Scrotum Function (Temperature 93.6 degrees F) Testes Epididymis Vas deferens Prostate gland Cowper’s glands Seminal vesicles Circumcision

5 5 Male External Genitalia

6 Figure 5.2 The male sex organs 6

7 Hormones and The Reproductive Life Cycle 7 Sex Hormones – Androgens: Sex hormones Testes produce testosterone Ovaries produce estrogen and progesterone – Cortex of the adrenal gland produces androgens in both males and females – Pituitary gland – Hypothalamus

8 Differentiation of the Embryo 8 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

9 Female Sexual Maturation 9 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

10 10 Figure 5.4 The menstrual cycle

11 Menstrual Problems 11 Dysmenorrhea – 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

12 Male Sexual Maturation 12 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 – Height growth

13 Aging and Human Sexuality 13 Women: Menopause – Ovaries gradually cease functioning – Decreasing estrogen – Increased risk of disease Men – Gradual decrease of testosterone

14 Sexual Response Cycle 14 Four phases typically characterize the sexual response cycle: 1.Excitement phase 2.Plateau phase 3.Orgasmic phase Males (refractory phase) 4.Resolution phase

15 © 2010 McGraw-Hill Companies. All Rights Reserved. Figure 5.5 Stages of the Sexual Response Cycle 15

16 Sexual Problems 16 Biological conditions affecting women: Vaginitis Vaginismus Endometriosis Pelvic Inflammatory Disease (PID) – 50-75% of PID cases are caused by STDs Biological conditions affecting men: Prostatitis (acute vs. chronic) Testicular cancer – Most common in men in their twenties and thirties

17 Sexual Dysfunctions 17 Common sexual dysfunctions – Male – Erectile dysfunction Premature ejaculation Delayed ejaculation – Women – orgasmic dysfunction Treatment – Physical examination – Pharmaceutical – Relaxation and massage techniques Sources of Sexual Dysfunctions – Psychosocial – Behavioral

18 Sexual Behavior 18 The development of sexual behavior – Gender roles and gender identity Gender role is everything you do in your daily life that expresses your maleness or femaleness Gender identity is your personal, inner sense of being male or female – Transsexuals –feel that their biological sex does not match their gender identity – Transvestites – wear clothing identified with the other gender – Intersexed –born with ambiguous genitals, neither fully female nor fully male.

19 Sexual Orientation 19 Person’s preference in sex partners – Heterosexuality – Homosexuality – Bisexuality Origins of sexual orientation – Biological and genetic factors – Learning theory


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