Histology Male Reproduction

Front 1

function of the male reproductive system

Back 1

* Functions to produce spermatozoa, seminal fluid (semen), and endocrine function

Front 2

* Paired glands with both exocrine (spermatozoa) and endocrine (testosterone) functions
* Are surrounded by a CT capsule (tunica albuginea)
* Tunica albuginea gives rise to CT septa that divide the testis into about 250 lobules

Back 2

testes

Front 3

Back 3

Front 4

function of Sertoli Cells

Back 4

* protection and nourishment of spermatogenic cells
* phagocytosis

Front 5

spaces between seminiferous tubules

Back 5

* loose CT (interstitial CT):
* lymphatic and blood vessels
* nervesinterstitial cells of Leydig which produce testosterone

Front 6

* Highly coiled tube about 5 m long that extends down the surface of the testis
* Functions as site of sperm storage and maturation; and absorption of water by stereocilia
* Lined with pseudostratified columnar epithelium with tufts of stereocilia (long microvilli)
* Absorb water
* Participate in uptake and digestion of residual bodies produced during spermiogenesis
* Wall has smooth muscle that move sperm toward ductus deferens

Back 6

Epididymis

Front 7

* Conducts spermatozoa from epididymis to urethra
* Is a thick walled, muscular tube (long, circ, long)
* Lined with pseudostratified columnar epithelium (sparse stereocilia)
* Epithelium and lamina propria (elastic fibers) are folded to allow for expansion during ejaculation
* Covered by adventitia
* Forms ampulla (after passing over u. bladder)

Back 7

Ductus Deferens/ Vas Deferens

Front 8

secretion of seminal vesicles

Back 8

fructose, fibrinogen, prostaglandins (among others)

Front 9

form ~70% of seminal fluid

Back 9

seminal vesicles

Front 10

* Spermiogenesis involves..

Back 10

* development of an acrosome (from Golgi)
* formation of a flagellum
* localization of mitochondria in the midregion

phagocytosis of excess cytoplasm (residual body) by Sertoli cells

Front 11

* Along the BM, are most primitive cells of germinal cell population – called spermatogonia
* Divide by mitosis to produce type A and B spermatogonia and eventually primary spermatocytes (PS)
* PS undergo meiosis I to produce haploid secondary spermatocytes (SS)
* SS undergo meiosis II to produce spermatids

Back 11

Spermatogenesis

Front 12

Back 12

Testes

Front 13

Back 13

Epididymis

Front 14

Back 14

seminal vesicles

Front 15

Back 15

prostrate gland

Front 16

3 bundles of erectile tissue in Penis

Back 16

2 corpora cavernosa

1 corpus spongiosum

Front 17

CT surrounding each erectile tissue

Back 17

tunica albuginea

Front 18

Back 18

penis