Male Genital System
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21 Terms
Epididymis
site of sperm maturation and storage
protein secretions nourish sperm and help maturation
Ductus Deferens
transports sperm to urethra
Bulbourethral Gland
produce alkaline, mucus rich fluid to neutralize urethral environment
Prostate Gland
produce enzyme rich component of semen
surrounds prostatic part of urethra
Seminal Gland
produce fructose- rich component of semen
found behind bladder
joins ampulla of ductus deferens to form ejaculatory duct
Scrotum
external sac outside body cavity
divided into 2 compartments by a septum
where testes are housed
Cremaster Muscle
contracts to elevate testis and maintain optimal temperature for sperm development
about 3 degrees cooler than body temp
3 erectile bodies of penis
unpaired corpus spongiosum
paired corpora cavernosa
Prostatic Urethra
passes through prostate
Membranous Urethra
passes through perineal muscles
Penile Urethra
passes through corpus spongiosum of penis
Descent of Testis
descends from abdominal cavity
through inguinal canal into scrotum
guided by gubernaculum
Cryptorchidism
failure of testis to descend
Spermatic Cord
ductus deferens, fascia, testicular vessels
extends from scrotum to inguinal canal
medial opening=superficial inguinal ring
deep inguinal ring= where ductus deferens and testicular vessels enter abdomen
Testes
produce sperm and androgens
divided by connective tissue septum into lobules containing:
seminiferous tubules, straight tubule, rete testis, efferent ducts
Spermatogonia
mature from basal → apical
more mature cells = closer to lumen
immature cells = deep to blood-testis barrier
Spermatid
haploid gametes in various stages of maturation
Spermatozoa
mature sperm cell
getting ready for spermiation
Nurse Cells
provide physical support for maturing spermatogonium
Interstitial Cells
lie outside of connective tissue capsule
produce androgens in response to luteinizing hormone which begins process of spematogenesis
Spermatogenesis
production of spermatid from spermatogonia
occurs in seminiferous tubules
begins during embryonic development, dormant until sexual maturity
spermatogonium → spematid → spermatozoa
direct stimulation by FSH
indirect stimulation by androgens