Male Reproductive System - Lab

Prostatic Urethra

Membranous Urethra

Spongy (penile) Urethra

Urinary Bladder

Rectum

Prostate gland - creates ~25% semen

Seminal vesicles - create ~70% of semen

Ejaculatory duct
Passes through prostate

Empties into urethra

Bulbourethral gland (<5% of semen)

Secretes preejaculate

Testes

Cremaster muscle - elevates/descends testes, skeletal muscle

Epididymis (head, body and tail)

Sperm storage and maturation

Spermatic Cord

Contains ductus deferens, nerves and vessels

Covered in cremaster muscle (skeletal)

Scrotum

Rete testis - sperm begin maturation here

Lobules

Ductus deferens

Long tube with smooth muscle in walls

Corpus cavernosum (erectile tissue)

Corpus spongiosum (erectile tissue)

Glans of penis

Nurse cells - help make blood-testis barrier

Interstitial (leydig) cells - make testostorone between tubules

Spermatids (germ cells)

Primary spermatocytes (germ cells)

Spermatogonia (germ cells)