Cardiovascular System - one of the most important systems of the body
Normal, well-coordinated functioning of our body is impossible without the full provision of each of its cells with oxygen and nutrients. In addition, complete and timely withdrawal of residues of used substances is extremely important. The lion's share of these functions is assumed by the cardiovascular system. Consequently, the health of our body depends on her condition.
Various pathologies and disorders in the work of the cardiovascular system, based on atherosclerosis of the vessels, are now one of the significant problems of modern medicine. On the one hand, the human body, and with it the cardiovascular system, is constantly experiencing mental and physical overstrain - bad ecology, stress, poor nutrition, etc. And on the other - all our products, which are sources of nutrients, are processed in various ways, while losing most of the necessary substances. As a consequence, there is a shortage of nutrients, and with it a "deficit" of health.
The cardiovascular system of a person is one of the most important systems of the body, it is responsible for performing such functions as transportation of nutrients, hormones, gases and metabolic products from and to cells, protection from foreign cells and invading microorganisms, regulation of body temperature. All these tasks are performed directly by lymph and blood. Blood is a liquid connective tissue circulating in the blood vessel system, and lymph is a watery, transparent liquid containing white blood cells and located in the lymphatic vessels.
What does the cardiovascular system consist of?
The main components of the cardiovascular system are the blood vessels( veins, arteries and capillaries) that permeate all organs and systems, and the heart, which are the most important organ of the system. On how "healthy" or "not healthy" your vessels depend on the work of the body as a whole. The weight of the heart is on average 300 grams, and the size is equal to the clenched fist. The heart can drive 5 liters of blood per minute in a calm state and 25-35 liters / min.in a state of physical activity.
The main task of the heart is the rhythmic movement of blood through the vessels;it consists of two ventricles performing the function of a pump, and two atriums in which blood is collected. In the right atrium, venous blood accumulates from the whole body, and in the left - arterial blood from the lungs. The walls of the heart consist of three layers: the pericardium, myocardium and endocardium. The leading role in the work of the heart belongs to the central layer - the myocardium, which by its contractions ensures the release of blood beyond the heart.
Cardiovascular system is formed by two circles of blood circulation: large and small. Large originates in the left ventricle, and ends in the right atrium, provides blood to all organs and tissues of the body. The small circle of blood circulation is limited by the circulation of blood in the lungs, which here is enriched with oxygen, begins with the right ventricle and ends with the left atrium.
The heart is a hollow, rhythmically and clearly working, supplying the body with blood and oxygen throughout life, a muscular organ. Any pathological changes in blood vessels cause a disruption in the coordinated work of organs and systems, as well as the development of various diseases, such as, for example, cardiovascular failure. Its main signs are: weakness, swelling, shortness of breath, rapid heart rate. Symptoms, in most cases, appear gradually, as the disease develops slowly, so it is very important to detect it immediately.