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 Testis Epididymis Ductus deferens (vas deferens) Ejaculatory duct Urethra

Figure 28–1 The Male Reproductive System

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?

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 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 Epididymis Vas deferens Penis Uterine tubes