From the course of anatomy it is known that the penis (penis) is one of the organs of both the reproductive and genitourinary systems, and serves to excrete seminal fluid and urine, as well as intercourse. If we consider the structure of the penis, then we must say that it has a back part - the root, thanks to which it is attached to the bones of the womb, the middle part - the trunk, consisting of two cavernous bodies that are filled with blood fluid during an erection, so that the penis becomes hard and increases in size. It also has a front part, somewhat thickened - the head, while the crown does not have a penis.
So, we will begin to study the structure of the penis of a man from its middle part - the trunk (body).
The trunk consists of a spongy and two cavernous bodies, the cavities of which consist of cavernous bodies, they are filled with blood during sexual arousal. At the same time, the penis dramatically changes its size (increases three times), becomes firm and elastic, which means that an erection occurs. Further, the inflow and outflow of blood is regulated until the moment of ejaculation, after which the erection ends, and the blood, accordingly, recedes.
Cavernous bodies are presented in the form of two elongated bodies of a cylindrical shape with slightly pointed edges that attach to the pubic bones of the pelvis, forming the root of the penis.
The structure of the penis of a man is provided so that the urethra passes inside the spongy body of the penis (between the cavernous bodies), the ducts of the glands open in it, which intensely secrete a secret when sexual arousal occurs. This secret helps to moisturize the canal.
The head of the penis is covered with reddish skin with many glands that produce a stenosis and a large number of nerve endings. She always remains soft, representing the so-called buffer between the solid cavernous bodies and tissues of the woman's vagina.
The foreskin covers the head of the penis (it can be of various sizes), the removal of which at an early age makes it possible to avoid the appearance of various inflammatory processes that can cause penis diseases such as cancer.
It should be said that the foreskin consists of the outer (indistinguishable from the skin) and the inner (soft) leaves. Between the inner leaf and the head of the penis is a cavity, which in front opens with a hole. The structure of the penis of each representative of the stronger sex is provided so that the foreskin has the ability to easily move backward, while the head is exposed and enters the preputial space, highlighting a special secret that helps to improve this displacement.
On the underside of the penis, the foreskin is connected to the head of the so-called bridle, that is, a fold of skin inside which nerves and blood vessels pass.
Thus, the genitals in men are divided into internal and external. The internal organs provide the conception, as a result of which a new life is born, while the external ones are directly involved in sexual intercourse.