What is a penis?
Reproduction is one of the important functions of living organisms. For its performance in humans, the reproductive system is responsible, which, depending on the gender, is represented by a different set of organs. The main organ in the male reproductive system is the penis (penis). Let's talk about what a penis is and what are the features of its structure.
Penis (penis, phallus) - male external organ. It performs the following functions:
- engaging in sexual intercourse;
- sperm delivery;
- excretion of urine from the bladder.
Thus, the penis is part of the two systems - urinary and reproductive. For the proper implementation of these functions, the penis must have certain structural features.
The main components in the structure of the penis are:
- root (base) formed by two cavernous and one spongy bodies, which contain a large number of depressions;
- body (trunk);
- a head, in the skin of which a large number of glands and nerve endings are noted, as well as a hole for removing urine and sperm.
Blood supply to the penis
Blood supply to the penis is made through the deep and dorsal arteries of the penis, which, in turn, are branches of the internal genital artery. Venous blood from the penis flows through the deep dorsal vein into the cystic venous plexus and through the deep veins of the penis into the internal sexual vein.
A significant role in the implementation of the basic functions of the penis is played by the muscles with a certain innervation. In the structure of the penis is decided to allocate the following muscles:
- bulbous-spongy (responsible for many processes in erection, as well as during urination);
- sciatic-cavernous (responsible for straightening the penis and clamping its dorsal veins).