yl anatomy of the male reproductive system

8/16/2019 YL Anatomy of the Male Reproductive System

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THE MALE

REPRODUCTIVE SYSTEM

Oleh :

Dr. Yuli Trisetiyono, SpOG

Pembimbing :

Dr. Siti Moetmainah P, SpOG(K)


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The reproductive system becomes active after puberty. During puberty thereproductive organs mature to create a fertile individual capable of reproducing.The primary sex organs produce the sex cells (egg/sperm) and sex hormones.The accessory sex organs are all the components involved in maintaining thesex cell and assisting in the process of fertilization.


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The male reproductive system:This system is simpler than the female reproductive system.A. Scrotum: a sac located outside of the abdominal cavity, made up of a thin

layer of smooth and seletal muscle and sin. !t is divided into left and rightby a septum to form different compartments for the testicles. The scrotumeeps the testicles outside the body so they can be " degrees cooler than

normal core temperature. The muscles of the scrotum contract to bring thetesticles closer to the body in cooler conditions. !n #arm conditions theyrelax to allo# the sin to stretch and maximize cooling.


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B. Testes: $val shape organs made up of thousands of seminiferous tubules #here thesperm is produced. !t responds to follicle stimulating hormone that signals spermproduction. %hen the sperm is in its last stages of maturation it moves to theepididymus.1. Gross anatomy: about & x ', cm, complete surrounded by a fibrous capsule and

partially enclosed by a serous membrane that develop #hen the testes traveled

outside the body into the scrotum. The fibrous capsule divides the testicles into#edgelie compartments called lobules that are filled #ith seminiferous tubules.They are innervated by an abundant about of visceral sensory nerves that maethem very sensitive to pain. The high sensitivity serves for protection and in sexualarousal.


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2. Seminiferous tubules andspermatogenesis:

*. The seminiferous tubules

consist of a thic stratified

epithelium surrounding a

lumen. The epithelium has

spermatogenic cells that

mature into sperm.

*. +t puberty the seminiferous

tubules begin to produce about

& million sperm.

*. The spermatogenic cells are

protect by a bloodtestis barrier

that eep the cells from

activating the immune system.

*. -o# of testicular artery

results in poor $' supply – sperm develop very large

mitochondria helping them survive

the hypoxic environment of the

female reproductive tract

*. 0eminiferous tubules drain into

net#or called rete testis

*. Testicular veins drain to theinferior vena cava


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C. eproductive duct system is males: This section discusses thetubules through #hich sperm travel to exit the body.

1. !pididymis: organ that arches over the posterior lateral side of thetestis. !f you uncoil the epididymis is can be as long as 1meters or' feet2 During the t#enty days the sperm spend here they

complete maturation and gain the ability to s#im and fertilize. Duringe3aculation smooth muscle contracts to send mature sperm to theductus deferns.

2. "uctus deferens: also no#n as the vas deference, it runs superiorto the testicles, enters the abdominopelvic cavity, runs posterior tothe bladder, passes by the seminal vesicle, form the ampulla and

e3aculatory duct, and finally leads into the prostatic urethra.#. Spermatic cords: a tube of fascia holding blood vessels, nerves,

and the ductus deference.$. %rethra: +s discussed in the previous chapter the urethra and men

carries both sperm and urine. During e3aculation the sphinctermuscles close off the bladder so urine is not released into the

semen. The urethra is divided into the prostatic urethra (sectionpassing through prostrate gland), the membranous urethra(urogenital diaphragm) and the spongy urethra (penile). 4rethralglands along the spongy urethra secrete a lubricating solution beforee3aculation.


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Male Dut System


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". Accessory glands: These glands produce substances thatincreases the chances of sperm survival once it is outside the body.These secretions in addition to sperm form semen.

1. Seminal vesicles: paired glands located posterior to the bladder.During e3aculation smooth muscle contract to help secrete a fluidthat contains fructose (sugar), nutrients, prostagladins to stimulatethe urethra to contract, substances that suppress the immunesystem against sperm in females, enzymes the enhance sperm

mobility, and enzymes that thicen the e3aculate.

2. &rostate gland: the size of a chestnut, also has smooth musclethat contracts to assist in the release of prostatic secretion. This isa mily #hite fluid that has substances to enhance sperm mobilityand thicen e3aculate. !t is susceptible to tumors and sexually

transmitted diseases (0TDs).

#. Bulbourethral glands: secrete a mucus substances thatlubricates and neutralizes the acid from urine in the male urethra.


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!essory Glan"s

• Seminal #esiles

– posterior to bla""er

– empty into e$aulatory "ut

• Prostate glan"

– belo% bla""er, surroun"s

urethra an" e$aulatory "ut

– & ' ' m

• *ulbourethral glan"s – near bulb o+ penis

– empty into penile urethra

– lubriating +lui"


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E. Penis

• nternal root an" #isible sha+t an"glans – e'ternal portion is in. long %hen

+lai"

– s-in o#er sha+t is loosely attahe"allo%ing e'pansion• e'ten"s o#er glans as prepue or +ores-in

• onsists o+ ylin"rial bo"ies o+eretile tissue – single orpus spongiosum along

#entral si"e o+ penis•

enloses penile urethra• en"s as a "ilate" bulb ensheathe" by bulbospongiosus musle

– paire" orpora a#ernosa• "i#erge li-e arms o+ a Y

•

eah rus attahes to pubi arh / iso#ere" %ith ishioa#ernosus musle


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!natomy o+ the Penis


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0e++erene

1. 0ohen 23, Yo-ohi , 45t$en6Dreoll 7. olor!tlas o+ !natomy ! Photographi Stu"y o+ the

8uman *o"y. Phila"elpia: 4ippinott 3illiams

/ 3il-ins9 &11.&. ;etter


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P770

•Daerah paling sensiti+ yg manaA

• Sara+ nyeri la-i& sebagai lous minoris a"alah

srotumA KenapaA

•Sara+ pusatA Sara+ simpatis parasimpatisA

yl anatomy of the male reproductive system

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