Heart (this article is in Russian[ru] – сердце) – the central organ of the circulatory system in animals and humans, forcing blood into the arterial system and ensuring its movement through the vessels.
Circulatory system by cells and tissues of the body supplied with nutrients and oxygen, and removed from the products of metabolism. Therefore, the circulatory system is sometimes called the transport or distribution, system.
In humans, the heart is located in the thoracic cavity asymmetrically: 1/3 it is the right of the median plane of the body, 2/3 – on the left. The base of the heart facing up, back and to the right; tip – down, forward and to the left.
The rear surface of the heart adjacent to the diaphragm. Since it is surrounded on all sides with light, except for the front surface immediately adjacent to the chest wall (Fig. 1):– Далее –