Результаты (
английский) 2:
[копия]Скопировано!
Text. The Heart and The Vascular System
The heart is an inner hollow muscular organ placed within the chest and included in the
pericardium. The base of the heart is against the third rib. Apex is against Its the interspace
between the fifth and sixth costal cartilages. The weight of the heart is about 300 grams (gr) in
the male and about 220 in the female gr.
The heart consists of two separate chambers divided by the septum. Of the chambers Each has
two connected parts: the atrium and the ventricle. Atrioventricular valves separate The the atria
from the ventricles.
The right atrium is larger than the left one, but the walls of the left atrium are thicker than those
of the right one. The right ventricle is triangular (triangular) in form and has thick walls. The
right ventricle is in the anterior part of the heart. Left ventricle is The longer and more conical
than the right one. The walls of The left ventricle are three times as thick as the walls of the right
one. The valves are located at the entrance and exit (Output) of each ventricle.
The muscular structure of the heart consists of fibrous bands divided into two groups - the
first ones are the fibrous bands of the atria and the second ones are the fibrous bands of the
ventricles.
The vascular system consists of three groups of vessels - arteries, veins and capillaries.
The vessels carrying blood to and from the tissues of the body compose the general system.
They are called the systemic vessels.
The pulmonary system is formed by the to carrying blood vessels and from the lungs.
The portal system is formed by passing the veins to the liver.
Most of the arteries are composed of three coats. Arteries dilate and The contract
simultaneously with the action of the heart.
переводится, пожалуйста, подождите..