Why did the raised hand turn pale, and the lowered one blushed? The causes of the disturbing phenomenon
Our body is a complex system, where each organ performs its function. But all the components of the human body function only thanks to one, the most important element - the heart. This muscle is responsible for supplying blood to tissues and organs, without it there is no life, its "breakdown" leads to serious diseases. Knowledge of how the heart works helps a person to coordinate life activity as effectively as possible. It also helps to know and understand why in some situations the extremities of the body turn pale or blush. For example, why the raised hand turned pale, and the lowered blushed? The obvious answer lies in the basic knowledge of the work of the heart and the laws of physics. After understanding the functioning of the heart muscle, a person will understand why this is happening and whether it is normal. A brief biological excursion will be useful for both children and adults.
Heart - the pump of the human body
The work of the heart is very similar to the function of a pump that pumps blood and spreads it throughout the body. Blood feeds vital organs, tissues. It supplies them with oxygen and the necessary substances. Without this, human life is impossible. The heart consists of four muscle compartments: the right atrium and the corresponding ventricle( right), the left atrium and the corresponding ventricle( left).
Each side of the heart means pumping blood through certain arteries, veins and vessels. The course of blood is divided into a small and large circle. Blood enters the lungs, enriches with oxygen and continues its way throughout the body. After that, she will again fall into the pulmonary arteries, and the circle will repeat. A continuous flow is provided by a strong heart muscle that pumps fluid throughout the entire life cycle of the individual. Knowing the physiology of the heart rhythm, you can understand why the raised hand turned pale, and the lowered blushed.
The influence of Newton's law
Everything on Earth is influenced by gravity. The human circulatory system is no exception. If the body did not have special heart valves, the blood would simply accumulate in its lower part due to gravitational attraction. The presence of special bridges and muscles contributes to a uniform blood distribution. This fact and knowledge about the anatomical structure of the heart make it possible to understand why the raised hand turned pale, and the lowered one blushed. What causes this phenomenon? Newton's law.
Why did the raised hand turn pale, and the lowered blushed?
When a person lifts a limb up, the blood can not enter the upper part at the same speed. Its flow is slowed down by gravity. If the hand is held for a long time, it will not only turn pale, but also numb. The omitted limb, on the contrary, will begin to receive excess blood. For this reason, the veins on the arm can swell, and the skin can turn red. The laws of physics and the work of the heart explain this simple phenomenon. There is no panic for anxiety. This is a perfectly normal condition of the limbs in the position of the arms up or down.
Knowing the basic functions of the heart and how the gravitational forces of the Earth act, everyone can now understand why the raised hand turned pale, and the lowered one turned red.