Everyone knows how hard it is to be in an unventilated room for a long time: from stuffiness the head begins to hurt, lethargy, fatigue, drowsiness appear … Many explain this by a lack of oxygen. And they are mistaken.
In the air of a poorly ventilated room, the oxygen content decreases so slightly that it cannot have any negative effect on the body. Glory, for example, about the beautiful air of Kislovodsk spread throughout the world. And in this city. located at an altitude of about 1000 meters above sea level, the oxygen content, or rather its partial pressure (the pressure that molecules of this gas only produce), is 20 millimeters of mercury below. than in Moscow. Continue reading
The disease sneaks up unnoticed
Coronary heart disease develops gradually and by the time it manifests itself, it usually goes very far.
For the first time, a disease manifests itself in different ways: myocardial infarction, angina pectoris, or sudden cardiac catastrophe. caused by heart rhythm disturbances. In patients with first-occurring angina pectoris, narrowings in the coronary arteries (atherosclerotic plaques) are usually found.
Plaque does not occur overnight. If you examine it under a microscope, then like the annual rings of a tree, it has a layered structure indicating age. Already in children, lipid spots are found on the inner lining of the arteries. By the age of 50 (sometimes later, sometimes earlier), the plaque can grow so much that it will impede the flow of blood to the heart muscle. Continue reading
Does everyone need to relax in the south?
What can a month spent by the sea turn into?
Should children be taken south?
The habit of a certain ambient temperature, the amount of sunlight, even the time of sunrise and sunset is formed from generation to generation, creating a kind of geographical stereotype of every living organism. Abrupt changes in habitual living conditions require the stress of all regulatory systems from him. Therefore, in the heat, the capillaries of the skin expand. blood flow increases, sweating increases, the mineral composition of blood changes, the work of the endocrine glands, respiration, and blood circulation is rebuilt. A healthy body can cope with such a load. But can the weakened cope? So now we’ll think about whether everyone will be able to relax in the south with benefit for the summer. Continue reading