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Lecture 44

Anatomy and Cell Biology 3319 Lecture Notes - Lecture 44: Peritoneum, Seminiferous Tubule, Abdominal Internal Oblique MusclePremium

18 pages52 viewsFall 2017

Department
Anatomy and Cell Biology
Course Code
Anatomy and Cell Biology 3319
Professor
Michele Barbeau
Lecture
44

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March 22, 2018
Anatomy 3319
Male Reproductive System:
Reproductive Structures:
Primary sex organs
Gonads (testes)
Contained within a scrotal sac
Form spermatozoa
o Generation of sperm is not good at body temperature so testes help keep it cool
Secrete sex hormones (androgens)
Sac can be contracted or relaxed
o Muscle reflex where the testicles will elevate if we rub the thigh (cold = up)
o Can damage the perineum and the reflex
Blood supply
o Penpinform plexus
§ Veins for grape like network so that heat is exchanged back to body and
testes remain cool
Secondary Sex Organs
Transmission of sperm
Ducts – epididymis, ductus, (vas) deferens, ejaculatory duct, urethra
Accessory glands – seminal vesicles, prostate gland, bulbourethral gland
Copulatory organ – penis
Male Reproductive System
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Scrotum
Sac-like, supports and protects the testes and regulates their position
Each testicle is contained in separate compartment
o Weld down middle
Maintain testes at 3C below body temperature
o So spermatogenesis works
Extensive innervation and blood supply
Coverings are continuous with the fascia of the spermatic cord
o Testes during development, when first appear, will appear at the level of the
kidneys and are retroperitoneal
o Then as the baby begins to grow, the testes start migrating and get to the scrotum
o Penetrate through the anterior peritoneal wall
o Will carve out the inguinal canal: the route the testes took
§ Into the scrotum
§ Can cause lots of problems
§ Inguinal hernias
o Coverings are related and we can guess the route it took
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Scrotum:
Skin
Superficial fascia:
Dartos muscle: contracts the skin
o When scrotum relaxed: loose skin, when contracted: very tight
o Cardboard like appearance
Right and left testes separated by a septum
Spermatic cord
Has layers of connective tissue and muscle
Contains the testis, found in the inguinal region
Can open up the scrotum and pull out the spermatic cord
o Can find lots of layers
§ External fascia
§ Cremasteric muscle
Cremasteric muscle = elevate or descend the muscle when
contracted or relaxed
Removing this muscle, we can see the testis
During movement has moves the blood supply and ductus deferens down
Penpineform complex: complex blood supply
In the spermatic cord
Testis: in the scrotum
From superficial to deep
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