1. p274

2. Figure 9.1 Puberty
The body’s endocrine system produces hormones that trigger body changes, including growth spurts, in boys and girls.
Figure 9-1 p277

3. Figure 9.2 The Female Sex Organs and Reproductive
Structures
Figure 9-2 p279

4. Figure 9.2 The Female Sex Organs and Reproductive
Structures
Figure 9-2a p279

5. Figure 9.2 The Female Sex Organs and Reproductive
Structures
Figure 9-2b p279

6. Figure 9.3 Menstrual Cycle
(a) In response to the hypothalamus, the pituitary gland releases the gonadotropins FSH and LH. Levels of FSH and
LH stimulate the cycle (and in turn are affected by production of estrogen and progesterone).
(b) FSH does what its name says—it stimulates follicle development in the ovary. The follicle matures and ruptures,
releasing an ovum (egg) into the fallopian tube.
(c) The follicle produces estrogen, and the corpus luteum produces estrogen and progesterone. The high level of
estrogen at the middle of the cycle produces a surge of LH, which triggers ovulation.
(d) Estrogen and progesterone stimulate
the endometrium, which becomes
thicker and prepares to receive an
implanted, fertilized egg. If a fertilized
egg is deposited in the uterus, pregnancy
begins. If the egg is not fertilized,
progesterone production decreases,
and the endometrium is shed (menstruation).
At this point, both estrogen
and progesterone levels have dropped,
so the pituitary responds by producing
FSH, and the cycle begins again.
Figure 9-3 p281

7. Figure 9.4 Male Sex Organs and Reproductive Structures
Figure 9-4 p283

8. Figure 9.4 Male Sex Organs and Reproductive Structures
Figure 9-4a p283

9. Figure 9.4 Male Sex Organs and Reproductive Structures
Figure 9-4b p283

10. The key to a healthy,
happy sexual relationship
is open, honest
communication—even
when you and your
partner have different
points of view.
p285

11. During adolescence,
teens explore different
social and intimate
relationships as they
begin to develop a
sexual identity.
p287

12. In a loving, committed
relationship,
every form of physical
contact can serve
as an intimate form
of expressing deep
emotion.
p290

13. Close-couple
homosexual relationships
are similar to
stable heterosexual
relationships.
p292

14. Couples can find
many ways to express
their affection for and
delight in each other.
p296

15. Figure 9.5 A Cross-Sectional View of Sexual Intercourse
Sperm are formed in each of the testes and stored in the epididymis.
When a man ejaculates, sperm carried in semen travel up the vas deferens.
(The prostate gland and seminal vesicles contribute components of
the semen.) The semen is expelled from the penis through the urethra
and deposited in the vagina, near the cervix. During sexual excitement
and orgasm in a woman, the upper end of the vagina enlarges and the
uterus elevates. After orgasm, these organs return to their normal states,
and the cervix descends into the pool of semen.
Figure 9-5 p297

16. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6a p298

17. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6a (1) p298

18. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6a (2) p298

19. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6a (3) p298

20. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6a (4) p298

21. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6b p298

22. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6b (1) p298

23. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6b (2) p298

24. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6b (3) p298

25. Figure 9.6 Human Sexual Response
The four stages of sexual response are excitement, plateau, orgasm, and resolution.
Figure 9-6b (4) p298

26. Sexual problems can
be difficult for partners
to talk about, but
lack of communication
can create tension and
increase anxiety.
p301

27. Sex sells. Topless bars
and strip clubs are
among the businesses
that cater to those
who enjoy sexual
stimulation outside a
loving relationship.
p305