Interview
Human Reproduction Grade 12 Life Sciences
- Course
- Institution
- Book
Human reproduction. Images included.
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
Chromosomes and Meiosis Grade 12 Life Sciences
-
DNA Code of Life Grade 12 Life Sciences
-
Environmental Studies Grade 12 Life Sciences
Seller
Followkylaboyd-davison
Content preview
Human Reproduction:Two separate sexes – male and female.
Male reproductive system:
What makes up the reproductive organs?
Primary sex organs – the testis
Ducts:
Epididymis
Sperm duct (vas deferens)
Urethra
Accessory glands - e.g. prostate gland
External genetalia – the penis
,Reproductive Location / definition Function
organ
, Scrotum Contains the testis 1. Regulates temperature,
keeping testis 2 to 3°
lower than body temp.
2. Houses and protect testis
Testis Two oval structures suspended outside of 1. Produce sperm, by the
body in scrotum. germinal layer
Testis consist of many lobules, which 2. Produce testosterone,
contain highly convoluted tubules, the by the interstitial cells.
seminiferous tubules
Germinal epithelium lines the tubules
Between tubules are groups of
endocrine cells, the interstitial cells, or
cells of Leydig.
Ducts Three main ducts:
1. Epididymis Seminiferous tubules join to form the Immature sperm enter
epididymis, a highly convoluted tubule. epididymis where they:
1. mature, to become
motile and fertile
2. are stored for several
months.
2. Sperm Continuation of epididymis. Leaves the 1. Pushes nature sperm
duct scrotum, passes through the prostate gland, forward by strong
and then enters the urethra. peristaltic waves, from
the epididymis into the
urethra – ejaculation.
Peristaltic wave – strong
contraction of smooth muscle
in walls of ducts
3. Urethra Duct at end of the uro-genital system leading Forms common duct for
to the exterior. transportation of semen
and urine, although
these two processes
never occur together.
Prostate gland Plum-sized gland surrounds urethra at base Secretes fluid that aids the
of bladder. transport of the sperm and
contains enzymes that make
sperm more active.
Penis Urethra passes down male external Deposits semen with sperm
organ, penis into female’s vagina during
Consists of special spongy tissue. copulation.
Running the length of penis there are
three sections of erectile tissue.
+ 2 situated on dorsal side
>> corpus cavernosa
+ one on ventral side
>> corpus spongiosum
Erection: dilation of dorsal and central
arteries supplying blood to penis. Allows
for more blood to fill three spongy
erectile tissue chambers. Causing penis
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 kylaboyd-davison. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.94. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67474 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now