Flashcards in Reproductive System Deck (193)
The process by which organisms produce offspring by means of gametes.
Sperm and eggs
Testes and ovaries
Produces sperm and secretes hormones.
Cutaneous out-pouching that supports the testes
Muscle found in scrotal septum that causes wrinkling in scrotum.
How much cooler than body temp do sperm require to live?
Three degrees cooler.
In spermatic cord
Elevates testes when cold or aroused.
Serous membrane derived from the peritoneum. Forms when testicles descend.
Partially covers testes.
In testis. Internal to tunica vaginalis.
Extends inward. Forma septa that divides testis into 200-300 lobules.
Pathology. Collection of fluid in tunica vaginalis.
Contains 2-3 seminiferous tubules
where spermatogenesis occurs.
Site of spermatogenesis.
Contained within lobule.
Contains two cell types:
Stem cell within seminiferous tubules
Primordial sperm cells --> spermatogonia --> primary spermatocytes --> secondary spermatocytes --> spermatid
AKA sustenacular cells
Support spermatogenesis in the testes
Form blood-testis barrier
Release inhibit, regulate testosterone and FSH
Produce fluid for sperm transport
Phagocytose excess spermatid cytoplasm
Protect, support and nourish developing sperm
Release sperm into lumen of seminiforous tubules.
AKA interstitial cells of the testis
Located in between seminiferous tubules
Produce and secrete androgens, especially testosterone.
Descent of Testes
Testes develop near kidney and descend into scrotum through inguinal canal during 7th month of development.
Failure of testes to descend
Pathway of sperm through ducts:
1.5 inches long -- 20 feet if uncoiled
Along posterior borders of testes
Multiple efferent ducts --> ductus epididymis --> vas deferens
Ductus epididymis: histology & function
Bulk of epididymis
Lined with pseudo stratified microvilli'd columnar epithelial cells and a layer of smooth muscle
Site of sperm maturation and storage (up to 1-2 months). The either expulsion or reabsorption.
Vasectomy involves cutting/cauterizing of:
All structures passing to/from testes.
Paminiform plexus of veins
Seminal ducts + vas deferens
Eject spermatozoa into prostatic urethra
Also adds fluid
8 inch passage for urine and sperm
Prostatic (through prostate)
Membranous (through UG diaphragm)
Spongy (through corpus spongiosum)
2 inch tunnel/weak spot in the three muscles of anterior abdominal wall.
Deep inguinal to superficial ring.
Passageway for spermatic cord and iliolingual nerve.
Rupture or separation of a portion of the abdominal wall resulting in protrusion of part of an organ. (Most often intestine).
Loop of intestine protruding through deep ring
Loop of intestine pushing through posterior wall of inguinal canal