Chapter 10
The Muscular System
345
10
Pelvic
diaphragm
Symphysis pubis
(a)
Levator ani
Piriformis
Posterior
Anterior
Coccyx
Coccygeus
Obturator
internus
IIiococcygeus
Levator ani
Pubococcygeus
Urogenital diaphragm
Urethra
Vagina
Anal
canal
Inferior pubic ramus
External urethral
sphincter
Urethral
opening
Vaginal
opening
Deep transverse
perineal muscle
Central tendon
Anus
External anal
sphincter
Male
(b)
Female
Male
Female
Penis
Midline raphe
Ischiocavernosus
Clitoris
Urethral
opening
Anus
Vaginal
opening
Bulbospongiosus
Superficial
transverse
perineal muscle
Levator ani
(c)
Gluteus maximus
Figure 10.13
Muscles of the pelvic
floor and perineum.
(a)
Superior view
of muscles of the pelvic diaphragm
(levator ani and coccygeus) in a female
pelvis.
(b)
Inferior view of muscles of the
urogenital diaphragm of the perineum
(external urethral sphincter and deep
transverse perineal muscles).
(c)
Muscles
of the superficial space of the perineum
(ischiocavernosus, bulbospongiosus, and
superficial transverse perineal muscle),
which lie just deep to the skin of the
perineum. Note that a raphe is a seam of
fibrous tissue.
MUSCLE GALLERY
Table 10.7
(continued)
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