Chapter 5
Sex and Your Body
Learning Objectives
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Structure and function of male and female
sex organs
How sex organs function during sexual
activity
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Sexual health problems
Sexual dysfunctions
Responsible sexual behavior
POP QUIZ
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Worksheet #36
Sexuality
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Biological sex
Gender traits and behaviors
Sexual anatomy and physiology
Sexual functioning and practices
Social and sexual interactions
Sexual Anatomy: Gonads
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Reproductive organs
that produce germ
cells and sex
hormones
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Ovaries – Egg (ovum)
Testes – Sperm
Worksheet #35
Female External Reproductive
Organs (Genitalia) – Vulva
Female Internal Genitalia
Male External Genitalia
Male Internal Genitalia
Sex Hormones
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Androgens – primarily
male hormones
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Steroids promote
masculinization in males and
females
 Adrenal glands
Testosterone promotes
masculinization in males and
females; regulates other
sexual functions in women
 Males: Testes, adrenal
glands
 Females: Ovaries,
adrenal glands
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Primarily female
hormones – Female
secondary sex characteristics,
menstrual cycle, gestation, and
sexual functioning in men
 Estrogen
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Ovaries, Adrenal glands,
Testes
Progesterone
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“For Pregnancy”
Corpus luteum, Adrenal
glands, Placenta
Sex Hormone Determines Gender
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23rd Pair of
Chromosomes
XY = Male
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Testosterone
XX = Female
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XY
No Testosterone
XX
Homologous Reproductive
Organs
 Penis
 Clitoris
 Scrotum
 Labia
 Testis
 Ovary
majora
Sexual Functioning:
Stimulus – Response Cycle
(Fig. 5-4, p. 134)
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Physical Stimulus
Psychological Stimulus
Stages of Sexual Response
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Excitement
Plateau
Orgasm
Resolution
Sexual Response Terms
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Vasocongestion
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Myotonia
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Accumulation or engorgement of blood
Increased muscle tension
Rhythmic muscular contractions
Refractory period
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Men: have a refractory period
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Cannot immediately be re-stimulated to orgasm
Women: no refractory period
 Sexual
Response
Cycle
Common Sexual Health Problems
(p. 135)
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Physical (biological) conditions
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Vaginitis (including yeast infection)
Endometriosis
Pelvic inflammatory disease (PID)
Prostatitis
Testicular cancer
Common Sexual Dysfunctions
(p. 135)
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Disturbances in sexual desire,
performance, or satisfaction that have
physical and/or psychological origins
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Vaginismus
Orgasmic dysfunction
Erectile dysfunction (impotence)
Premature ejaculation
Retarded ejaculation
Sexual Dysfunction is Common
Results from a national survey of people aged 18 to 59 years
reported in the February 10, 1999, issue of The Journal of the
American Medical Association indicate that sexual dysfunction
was common among women (43 percent) and men (31
percent).
Prevalence of Sexual Problems
Development of Sexual Behavior
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Gender roles – your everyday behavior and attitudes
based on your sex
Gender identity – your inner sense of being male or
female
Cultural differences – culturally expected or appropriate
Portrayal of sex in the media
Childhood and adolescence
Adult sexual experiences
Disability or illness
Sexual orientation
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Combination of biological, psychological, and social factors
Varieties of Sexual Behavior
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Celibacy, or abstinence
Masturbation
Touching
Oral-genital stimulation
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Cunnilingus
Fellatio
Anal intercourse
Vaginal intercourse
Ask yourself the following:
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Is this sexual behavior healthy and
fulfilling for me and/or my partner?
Is it safe?
Does it lead to the exploitation of the
other?
Does it take place between responsible,
consenting adults?
Responsible Sexual Behavior
Making choices about your sexual behavior
directly affects you and another person
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Communication
Agreed-upon activity
Sexual privacy
Contraception use
Safer sex
Sober sex
Be responsible for consequences
On your own…
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Worksheet #38
Tips for Today, p. 147