Lab 42
Reproductive Anatomy
• Be able to identify the following tissues
microscopically: testes (seminiferous tubules),
ovary (stages), sperm, mammary gland (active
vs not), prostate gland. Be able to identify a
follicle within an ovary.
• Be able to identify the following structures on a
model: testes, epididymis, ejaculatory duct,
prostate gland, bladder, urethra; ovary, Fallopian
tube, uterus, cervix, vagina, bladder, urethra
The Male Reproductive System
• Testes or male gonads:
– secrete male sex hormones (androgens)
– produce male gametes (spermatozoa or
sperm)
Pathway of Spermatozoa
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Testis
Epididymis
Ductus deferens (vas deferens)
Ejaculatory duct
Urethra
The Male Reproductive System
Figure 28–1
The Epididymis
Figure 28–9
Epididymis
• Lined by psudostratified columnar
epithelium with sterocilia
Epididymis
• Using low power, take a look around (again,
don’t draw). Orient yourself, find the
seminiferous tubules, and then find the
epididymis.
• On medium or high power, sketch the
epididymis. In your sketch, draw and clearly
label: lumen, epithelium (take a very close look
at it, and describe what you see), the type of
epithelium, smooth muscle, spermatids (if
present).
A. Where are these sperm headed next?
The Ductus Deferens
Figure 28–10a, b
The Ductus Deferens
• Also called vas deferens
• Begins at tail of the epididymis
• Curves inferiorly along urinary bladder: toward
prostate gland and seminal vesicles
• Lumen enlarges into ampulla
• Is lined by ciliated epithelium: peristaltic
contractions propel spermatozoa and fluid to
urethra
• Wall contains thick layer of smooth muscle
B. Vas Deferens (ductus
deferens)
• Using low power, take a look around. Try to
locate the seminferous tubules, epididymis and
vas deferens. Can you see how much muscle
surrounds the vas deferens?
• On medium or high power, label: lumen
(spermatids?), epithelium (what type?), and
smooth muscle layers.
A. What is the function of the ductus
deferens?
B. How is the ductus deferens affected by
vasectomy?
The Penis
Figure 28–11b, c
The Penis
Figure 28–11a, b
The Corpora Cavernosa
• 2 cylindrical masses of erectile tissue:
– under anterior surface of flaccid penis
– separated by thin septum
– encircled by dense collagenous sheath
• Extends to neck of penis
• Erectile tissue surrounds a central artery
The Corpus Spongiosum
• Surrounds penile urethra
• Is relatively slender
• Extends from urogenital diaphragm to tip of
penis
• Expands to form the glans
• Is surrounded by a sheath:
– with more elastic fibers than corpora cavernosa
• Erectile tissue contains a pair of small arteries
Penis
A note on penile anatomy
• You KNOW that a man made this decision:
The anatomical position for the penis is
erect…
– Thus the dorsal surface is the “top” of the
penis, which when fully erect, points up
– The underside of the penis is thus ventral
45.4- Penis (penile tissue)
• Draw and clearly label this cross section
through the penis, label: urethra, corpus
spongiosum, central arteries, corpora
cavernosa and indicate the dorsal blood
vessels.
• A. In the anatomical position, is the
urethra anterior or posterior to the corpora
cavernosa?
Organs of the Female
Reproductive System
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Ovaries
Uterine tubes
Uterus
Vagina
External genitalia
The Female Reproductive
System
Figure 28–13
The Female Reproductive
System
• Ovaries or female gonads
– release 1 immature gamete (oocyte) per month
– produce hormones
• Uterine tubes:
– carry oocytes to uterus
• If sperm reaches oocyte:
– fertilization is initiated and oocyte matures into ovum
• Uterus: encloses and supports developing
embryo
• Vagina: connects uterus with exterior
Uterine Tubes
Ciliated and
non-ciliated
columnar cells
Slides
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Epididymis
Vas deferens
Penis
Uterine tubes