Efferent ductules 12 small ciliated ducts collecting sperm from rete testes and transporting it to epididymis Epididymis (head, body and tail)

Efferent ductules 12 small ciliated ducts collecting sperm

from rete testes and transporting it to epididymis

Epididymis (head, body and tail) 6 m long coiled duct adhering to

posterior of testis site of sperm maturation and storage

(fertile for 60 days) Ductus deferens (peristalsis during

orgasm) muscular tube 45 cm long passing up

from scrotum through inguinal canal to posterior surface of bladder

Ejaculatory duct 2 cm duct formed from ductus

deferens and seminal vesicle and passing through prostate to empty into urethra

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Vasectomy

Regions: prostatic, membranous and penile --- totals 20 cm long

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Seminal vesicles - pair posterior to bladder empty into ejaculatory duct

Prostate gland - single below bladder, surrounds urethra

and ejaculatory duct 2 x 4 x 3 cm

Bulbourethral glands - pair near bulb of penis empty into penile urethra lubricating fluid

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Internal root, shaft, and glans external portion 4 in. long when flaccid

The foreskin is termed the prepuce 3 cylindrical bodies of erectile tissue

corpus spongiosum along ventral side of penis encloses penile urethra

corpora cavernosa diverge like arms of a Y Erection

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Note the orderly maturation of germ cells from the base to the center of the lumen. Spermatogonia (along the basement membrane), primary & secondary spermatocytes, spermatids, and spermatozoa are seen.

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Mons pubis - mound of fat over pubic symphysis; covered by pubic hair

Labia majora - thick folds of skin Labia minora - medial, thin hairless folds

form vestibule contains urethral and vaginal openings form hoodlike prepuce over clitoris

Clitoris - erectile, sensory organ Vestibular bulbs - erectile tissue around vagina Greater and lesser vestibular and paraurethral glands

open into vestibule for lubrication

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Perimetrium - external serosa layer Myometrium - middle muscular layer

1.25 cm thick in nonpregnant uterus smooth muscle

produces labor contractions, expels fetus Endometrium

simple columnar epithelium with thick layer compound tubular glands stratum functionalis – superficial, shed each period stratum basalis - deep layer, regenerates a new stratum

functionalis with each menstrual cycle

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Hormonal changes cause spiral artery vasoconstriction, necrosis of stratum functionalis and menstrual flow

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Overlies pectoralis major conical body, nipple at apex axillary tail contains many lymphatic vessels

Nipple surrounded by areola dermal blood vessels closer to surface melanocytes darken during pregnancy smooth muscle contracts wrinkling skin and erecting nipple

in response to cold, touch and arousal Suspensory ligaments from skin, muscle Nonlactating breast has little glandular tissue

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