Male Reproductive System

Accessory Glands

Prostate gland, seminal vesicles, bulbourethral glands=secrete the fluid portion of seme

Penis

Erectile tissue, transports sperm to vagina, produces sexual sensations

Epididymis

Tubular organ, sits along posterior side of testes, receives stern from testes, site of sperm maturation

Testes

Produces sperm, secretes testosterone

Seminiferous tubule

One per lobule, highly coiled. Sperm are produces in the walls then releases into the lumen.

Tunica albuginea

Whitish capsule surrounding the testes

Tunica vaginalis

2 layered serous membranes encasing testes and epididymides

Scrotum

Encases the testes, epididymides, and spermatic cord

Spermatogenesis

Diploid stem cell (spermatogonium)-

Mitosis= Type A &Type B spermatogonia

Type A

Cell division- replenish diploid

Type B

Mitosis to 1 primary spermatocyte to meiosis 1 to 2 secondary spermatocytes to meioses 2 to haploid cells (spermatids) to 4 spermatids per primary spermatocyte

Interstitial cells (Leydig)

Cells in the spaces between seminiferous tubules that secrete testosterone.

Midpiece

Contains mitochondria

Ejaculatory ducts

Transports sperm from Ampulla and fluid from seminal vesicles to the prostatic urethra

Penile urethra (spongy urethra)

extends the length of the penis

Bulb

Formed by the corpus spongiosum

Crus

One on each side. Formed by corpus cavernosa

Corpus cavernosa

Columns of erectile tissue running along the shaft. A gorge with blood during arousal to cause an election .

Corpus spongiosum

Single columns of erectile tissue running along the shaft and urethra. Becomes engorged with blood during arousal.