Everyone knows what a penis is (and especially, what its use is), but not everyone knows how to name the parts of the penis or what function they have for reproduction or urination.
The following lines are a review for those who have already forgotten the anatomy lessons they taught us in school.

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The 5 external parts of the penis
The parts of the penis that remain outside the body are the scrotum and the penis itself (the sexual organ).
Let’s look in a little more detail at the characteristics and role of these parts of the external male anatomy.

1. Scrotum
Also called the ‘scrotal sac’, it refers to the skin that covers the testicles and is under the penis itself. The scrotum has a regulating function of ambient temperature: it contracts and protects the testicles, bringing them closer to the body when it is colder; while, at high temperatures, it relaxes and pushes them away.
The skin of the scrotum is wrinkled, contains pubic hair, and is an extremely sensitive area. Incidentally, it is one of the key parts of the genitals in the arousal of men during preliminaries and, unfortunately, one of the most forgotten.

2. Penis
Tube-shaped, the penis is the organ necessary for penetration and through which men urinate . Contrary to that of the males of other mammalian species, whose penis is retractable (it can be removed or inserted inside the groin), the human penis hangs from the outside of the body thanks to the fact that it is held together, together with the scrotum. , by two areas: the pelvic floor and the perineum.
The penis remains in two states, flaccid (relaxed) or erect (when, due to arousal, it fills with blood, increases in size and prepares for sexual intercourse).
The parts of the penis are:

2.1. Root
Or ‘base of the penis’, joins the organ above with the pubis (remember that the perineum holds the genitals together in the lower part of the body).

2.2. Body
Or also ‘trunk’, refers to the tubular organ of the genitals , which goes from the root to the tip or glans.
The interior of the body of the penis is crossed by the urethra, the conduit through which pee and semen come out.. Also within the penis are the suspensory and fundus ligaments, which keep it attached to the root.
When arousal occurs, the corpora cavernosa within the penis fill with the pumped blood, projecting the penis upwards and allowing an erection to occur. 23.

This is a small piece of skin that covers the glans (the end of the male sexual organ). During erection, the foreskin is pulled back, exposing the glans to facilitate penetration.
The foreskin is one of the parts of the penis that, for hygiene or cultural reasons, can be surgically removed , so it is not uncommon for some human penises to lack this small skin.

2.4. Frenulum
The frenulum is a skin ligament that joins the glans below with the rest of the foreskin and that is also removed in case of circumcision.

2.5. Glans
The glans is the end of the penis. There, the opening of the urethra is located, which allows the exit of urine and semen during urination and ejaculation, respectively. It is a very sensitive area and one of the parts of the penis that is very involved in sexual games.

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Other 10 internal parts of the male genitalia
Let’s now see which are the parts of the penis located inside the body, and let’s review them from the most internal to the outside:

Cremaster muscle We said before that the scrotum relaxes or contracts depending on whether it is hotter or colder. Well, within it, there is this muscle, which serves as the lining of the testicles and is the one that reacts to changes in temperature or when the area is caressed.

4. Testicles
They are the two glands that are held by the scrotum and that secrete sperm , in addition to producing male hormones (testosterone to a greater extent).
They are held in suspension, so they are not really attached to the body. In this way, the testicles can be kept 1 or 2 degrees below body temperature, thus allowing the sperm to survive.

5. Epididymis
The epididymis are two separate tubes that produce semen and where the sperm that come out of the testicles accumulate, so that they mature. When you ejaculate, the seminal fluid mixes with the sperm to exit through the vas deferens.

6. Vas deferens
After leaving each epididymis, sperm travel through these two long tubes before emptying into the seminal vesicles.

7. Seminal vesicles
These two small blisters of the male anatomy are responsible for producing the largest proportion of semen . They are what give it its viscous texture and provide fructose, an ingredient that allows the mobility of sperm and gives them the ability to survive outside the body long enough for fertilization to occur.

8. Prostate
This small gland produces proteins that are added to the seminal fluid , such as zinc and the so-called ‘specific prostate antigen’, which allows the semen to liquefy, facilitating the speed with which the sperm move.
It is also one of the internal parts of the penis that, properly stimulated, allows you to reach orgasm. Now, to access it you have to insert your fingers (or whatever it takes) through the anus and caress the area.

9. Cowper’s glands or bulbourethral glands
Before the semen comes out, these two glands secrete the so-called ‘pre-seminal fluid’ , responsible for moistening and cleaning the urethral duct of waste, to facilitate the passage of semen.

10. Urethra
Above, when we talked about the penis, we mentioned that it has this fine tube inside it. The urethra is the last of the internal penis parts, a tube that runs the length of this organ.through which urine, pre-seminal fluid and semen are expelled.

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