have you ever wondered what everything
is down there well i'm dr rena malek
urologist and pelvic surgeon and today
i'm going to be explaining everything
you need to know about male anatomy if
you're new here i make new videos every
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when you think about male anatomy we're
going to talk about two different kinds
of genitalia there is external genitalia
which is basically the things you see
and internal genitalia are the things
that are on the inside of the body that
help with everything that the male
genitalia needs to do there are two
major functions of the male genitalia
one is for reproduction so to create
healthy productive sperm that can then
fertilize an egg and create babies and
two is to urinate and so we're going to
start by talking about the penis
everyone knows where the penis is what
it looks like but let's talk about the
parts of the penis and what exactly it
entails so within the penis there's
obviously the erectile tissue those are
basically two cylindrical structures on
either side that tend to engorge with
blood when you are having an erection
these are called corpora cavernosa below
that on the bottom or what we call the
ventral side of the penis you'll see the
urethra or the p tube from which p comes
from around the urethra there's also an
erectile tissue called the corpus
fungiosum and this corpus spongiosum
that goes around the pea tube actually
widens to become the head of the penis
and the glands penis has a few different
parts associated with it as well there's
the corona or the ridge of the head of
the penis and this forms a v at the
bottom of the penis which you can see
and sometimes it's attached to what's
called a frenulum or a band of tissue
that connects the glands to the penis
shaft itself and the glans penis and the
frenulum both have lots and lots of
nerve endings and are very much involved
in ejaculation and essentially sometimes
also abnormalities and sensation have
been linked to premature ejaculation
which i've talked about in videos before
also in uncircumcised men you'll have a
prep use which is essentially the
foreskin that covers the gland's penis
and this ultimately when men get an
erection get stretched alongside the
corporal bodies which get filled with
blood like a sponge causing this firm
rigid erection this allows the penis to
then be engorged and firm enough for
penetrative intercourse and that's
essentially the function of the penis to
have penetrative intercourse and deliver
sperm and semen to the vaginal canal to
allow eventual fertilization
interestingly a lot of people talk about
the frenulum like what is the actual
function of the frenulum so the frenulum
does have quite a bit of nerve tissue
which attaches to the foreskin itself
and when you get an erection if you are
uncircumcised man that foreskin will
then stretch and it will pull tension on
the frenulum some very small studies
have looked at the length of the
frenulum and see if it correlates with
the degree of premature ejaculation a
male experiences with the thought that
maybe this stretch when it reaches this
significant tension during erection if
it's shorter that men will ejaculate
sooner because that will limit the
stretch of the penis and trigger the
spinal ejaculatory center to then
ejaculate and cause reduction of the
erectile tissue and back to normal size
the second part of the external
genitalia is the scrotum and the scrotum
is essentially the skin around the
testicles and it serves two very
important functions one is it protects
the testicles but two obviously men's
testicles hang outside their body and
this is because for optimal sperm
production the temperature of the
testicles needs to be slightly lower
than body temperature and this is
exactly why testicles are actually
outside the male's body rather than
internal like female ovaries and that
brings us to the testicles and the
testicles form testosterone and
testosterone as you know is vital for
reproduction and many other functions in
the male body including libido with
intercourse cognitive function the
ability to build muscle and so much more
unfortunately low testosterone is
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getting back to male anatomy again
testosterone is produced in the
testicles in particular cells called
latex cells these latex cells create
testosterone and they mature within the
testicle themselves and move to the
epididymis the epididymis is a cord-like
structure that sits on the top and side
of your testicles so if you examine your
testicle which i encourage you to do
each and every month because testicular
cancer can affect all men but most often
younger men who mostly don't have to
worry about other types of cancer so
make sure you examine your testicle each
and every month feel the testicle feel
the epididymis know what your normal
testicle feels like so if you feel
something abnormal you can go get it
checked out super easily just get an
ultrasound and talk to your doctor and
just make sure it's nothing serious
because testicular cancer is super
treatable if you want to learn more
about testicular cancer make sure you
check out my video that i made before
with chatter docs so once they're in the
epididymis they stay there until sexual
arousal occurs once arousal occurs those
sperm are moved to another tubular
structure called the vast deference and
you may have heard of the vas deferens
before because that's the structure
that's cut during a vasectomy if you're
considering a vasectomy or want to learn
more about that procedure make sure you
check out my video about that once
aroused the sperm then moves to the vast
and the vast deference is a very long
structure it's about 30 centimeters long
as the vas deferens gets closer to the
prostate which is the next organ we're
going to talk about the vas becomes a
little bit more dilated and tortuous and
then it combines with the seminal
vesicles into the ejaculatory duct and
this duct enters into the p tube near
the prostate in an area called the
prostatic urethra so to summarize the
vas is bringing the sperm from the
testicles into the ejaculate then the
seminal vesicles are also another
structure that combines fluid to the
ejaculate to make semen and the seminal
vesicles essentially are sac-like
structures that sit sort of behind the
prostate underneath the bladder and
these hold fluid all this fluid together
with the sperm itself will go out the
ejaculatory duct during ejaculation to
then create semen the seminal vesicles
contribute about 70 of the semen volume
so a lot of guys wonder if they have a
low ejaculate volume does that mean
they're not making enough sperm that's
not necessarily true the seminal
vesicles contribute a large portion of
fluid into the sperm itself they include
multiple components including fructose
which provides energy to the sperm as
well as fluid that makes the semen
alkaline because the vagina is acidic
and so in order for those sperm to
survive in that environment they need to
have an alkaline or more basic ph
there's also other things that provide
protection to the sperm itself as well
as prostaglandins or hormones that try
to limit the females immune response to
sperm itself the prostate gland is a
walnut shaped organ that sits behind the
bladder that also produces fluid that's
released during ejaculation this forms
about 10 to 20 percent of the fluid
that's ejaculated and includes things
that helps make sperm move better in the
fluid so they can actually reach the egg
when they're trying to fertilize it and
so lastly the seminal vesicles and the
vast reference link into the ejaculatory
ducts and these are essentially a
passageway for the seminal fluid the
prostate fluid and the sperm to combine
and form what you see as semen and
lastly of course another important part
of genitalia is the urethra or the p
tube so during ejaculation obviously the
urethra offers a way for semen to get
out of the body but when you're not
ejaculating or having reproductive
function that same tube allows you to
urinate and so that's exactly all the
structures that men have as part of
their genital tract i hope you guys
found this helpful and if you feel like
there's other components of just basic
sexual education that you never learned
and you want to learn about comment
below let me know and as always remember
to take care of yourself because you're
worth it
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