Class notes
Class notes BIO-1813
- Course
- BIO-1813
- Institution
- East Mississippi Community College
Class notes BIO-1813
[Show more]
Seller
Follow
Content preview
Chapter 14: The Male Reproductive System The reproductive system is not essential for a human to
survive
The MRS consists of primary and secondary sex organs and
the accessory glands
Primary sex organs (gonads):
o 2 testes
Secondary sex organs:
o Penis
o Scrotum
o A system of ducts
Epididymis
Ductus
Vas deferens
Urethra
Accessory glands:
o Prostate
o Seminal vesicles
o Bulbourethral glands
Perineum
Consists of the external genitalia (penis, scrotum, testes, &
anus)
Is a diamond-shaped region between the thighs
Borders the pubic symphysis anteriorly and coccyx
posteriorly
Scrotum
Skin covered sac behind the penis at the front of upper
thighs
Divided into 2 compartments with each containing a testis
Provides a cooler environment for testes than inside the
body, an ideal condition for sperm
Testes
, Each one is covered by a serous membrane called the tunica
vaginalis which has outer and inner layers separated by a
serous fluid
Contains 250 lobes that have 3 or 4 seminiferous tubules
that produce semen
The interstitial cells between the seminiferous tubules
produce the hormone call androgen
Testosterone is the major androgen
Effects of testosterone:
o Spermatogenesis: production of sperm
o Enlargement of the testes, scrotum, and penis
o Development of the pubic, axillary, body, and facial
hair
o Secretion of the sebum in skin which can cause acne
o Burst of growth at puberty which includes an
increased muscle mass, higher BMR, larger larynx
(deeper voice)
o Stimulates the brain to generate the male sex drive\
Spermatic Cord
The blood vessels and nerves to the testes – which arise in
the abdominal cavity pass through the inguinal canal where
they join with connective tissue
o This forms the spermatic cord that suspends each
testis from the scrotum
Left testis is lower than right
Within the cord are:
o An artery
o A weblike network of veins
o Nerves
o A thin muscle
o Vas deferens (where sperm are deposited when they
leave the testis)
Sperm
Sperm’s head contains 3 segments:
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller brookec764. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
48072 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 15 years now