This structure makes the cells and tissues of the human body receive nutrients and oxygen for their proper functioning.
Components of the circulatory system
The circulatory system is made up of the heart, which functions as a blood propellant. It also has many blood and lymphatic vessels that are the conductors of the red fluid. Blood vessels have capillaries, which have contact with cells of tissues and organs, forming a set within the interstitial fluid.
As we said before, this system or apparatus is composed mainly of the blood, the heart and the blood vessels.
Nutritive substances, which carry red blood cells, white blood cells, and platelets, are distributed in the body through the blood and through the blood vessels. Blood vessels are throughout the body and interconnected with each other, they are made up of arteries, veins and capillaries.
The heart constantly pumps blood to the lungs, which returns to the heart with oxygen, and it distributes it already oxygenated to all other organs of the body through the arteries. For its part, the heart consists of four chambers: the upper atria (right atrium and left atrium), and the lower, ventricles (right ventricle and left ventricle).
Another important objective of this device is to transport substances considered as waste. This is done from the cells to the lungs or kidneys, then they are eliminated from the body.
Examples of diseases of the circulatory system
- Atherosclerosis. It is the thickening and loss of elasticity of the walls of the arteries.
- Hypertension . It involves the elevation of blood pressure.
- Myocardial infarction. They are known as strokes or heart attacks. It occurs when there is a decrease in blood flow through the coronary circuit, causing the death of myocardial cells, given their low oxygenation.
- Stroke It occurs when a vessel running through the brain ruptures, causing a brain hemorrhage.
- Arrhythmias. It is the alteration in the heart rhythm, caused by failures in the heartbeat control system.
- Congestive heart failure . This condition suggests that the heart cannot distribute oxygen to the body, necessary for the body to function.
- Lymphadenopathy or swollen lymph nodes. Normally the groin, neck, armpit, behind the ears, under the jaw and the nape are inflamed.