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Male Reproductive System. Adolescence. _______________ Burst of _______________ activate maturation of the gonads: _______________ Begins: _______________ yrs of age. General Physical Changes. _______________ of the _______________ and _______________ _______________
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Adolescence • _______________ • Burst of _______________ activate maturation of the gonads: _______________ • Begins: _______________ yrs of age
General Physical Changes • _______________ of the _______________ and _______________ _______________ • _______________ changes • _______________ growth • _______________ changes • Changes in body _______________ and _____ • _______________ gland secretions thicken/increase _______________
External Genitalia • Gonads = _______________ • _______________ • _______________
Testes • Each testis is an oval structure about ___ cm long and ___ cm in diameter • Covered by: _______________ _______________ • Located in the _______________ • There are about _____ lobules in each testis. Each contains __ to ___ - _______________ tubules that converge to form a single straight tubule, which leads into the _____ testis. • Short _______________ ducts exit the testes.
scrotum • Consists of _____ and _______________ tissue • A _______________ _______________, of _______________ tissue in the center divides it into two parts, each containing one testis. • Consists of the _______________, _______________ cord, and an extensive _______ system
Epididymis • a long tube (about __ meters) located along the _______________ and _______________ margins of the testes. • Sperm that leave the testes are _______________ and incapable of fertilizing ova. They complete their maturation process and become fertile as they move through the _______________. Mature sperm are stored in the lower portion, or tail, of the _______________
spermatic cord • contains the proximal ductus____________, testicular ______and veins, lymph vessels, testicular nerve, _______________ muscle and a connective tissue covering.
Duct System • Sperm cells pass through a series of ducts to reach the outside of the body. After they leave the testes, the sperm passes through the _______________, _____________________, _______________ duct, and ___________.
Ductus Deferens [vas deferens] • a _______________ tube that is continuous with the epididymis. • Sperm are stored in the _______________ portion of the ductus deferens, near the epididymis
Ejaculatory Duct • Each ductus deferens, at the _______________ , joins the duct from the adjacent _______________ vesicle (one of the accessory glands) to form a short ejaculatory duct. • Each ejaculatory duct passes through the _______________ gland and empties into the _______________ .
Urethra • extends from the _______________ bladder to the external urethral orifice at the tip of the penis. • It is a passageway for sperm and fluids from the reproductive system and urine from the urinary system. • divided into three regions: The _______________ urethra, the _______________ urethra & the _______________ urethra (also called spongy urethra or cavernous urethra)
accessory glands • are the _______________ vesicles, _______________ gland, and the _______________ glands. These glands secrete fluids that enter the urethra.
Seminal Vesicles • Glands _____________to the urinary bladder. • Each has a short duct that joins with the _______________ deferens at the ampulla to form an _______________ duct, which then empties into the _______________ . • The fluid is _______________ and contains _______________ , _______________ and _______________ .
Prostate • A firm, dense structure about the size of a _______________ that is located just _______________ to the urinary bladder. • _______________ the urethra as it leaves the urinary bladder. • Numerous short ducts from the prostate gland empty into the _______________ urethra. The secretions of the prostate are thin, _______ colored, and __________. They function to enhance the _______________ of the sperm.
Bulbourethral Glands (Cowper's) • Small, about the size of a ____, and located near the base of the penis. A short duct from each enters the proximal end of the _______________ urethra. • In response to sexual _______________ , the bulbourethral glands secrete an _______________ mucus-like fluid
Seminal Fluid or Semen • A slightly _______________ mixture of _______________ cells and _______________ from the accessory glands. • Secretions from the seminal vesicles make up about ___ percent of the volume of the semen, with most of the remainder coming from the _______________ gland. The ____________ and secretions from the _______________ gland contribute only a small volume. • The volume of semen in a single _______________ may vary from _____ to _____ ml. There are between ____ to _____ million sperm per milliliter of semen. Sperm counts below ___ to ___ million per milliliter usually present _______________ problems.
penis • is a _______________ pendant organ located anterior to the _______________ and functions to transfer _______________ to the _______________ . • 3 parts: a _______________ , _______________ (_______________ ), and _______________ _______________ . • The _______________ of the ________attaches it to the pubic arch • the ________ is the visible, ________ portion. • The corpus spongiosum expands at the distal end to form the ________ ________.
Spermatogenesis • Drawing On board
