In addition to racial characteristics, people living in different climatic zones have formed features such as proportion and body weight, type of chest, metabolic rate, blood composition. The differences are most pronounced between the indigenous inhabitants of regions with extreme conditions. In this regard, the following groups of people are distinguished:
1. Arctic – the indigenous people of the North. They have a stocky physique, a cylindrical chest shape, an oval-shaped body, a wide flattened nose, and a narrow eye section. Fats prevail in the diet, so the level of metabolism is high. This serves as an adaptation to low ambient temperatures.
2. Tropical. Elongated body shape, wide flattened nose, large lips, lots of sweat glands. Carbohydrates predominate in the diet, which ensures a low level of metabolism. Due to this, they have a pronounced adaptability to high temperatures and humidity.
3. Desert. Features – an elongated body with a flattened chest, poor development of subcutaneous fat, increased heart rate and respiration, low metabolic rate, which allows you to comfortably live in high temperatures, low humidity.
4. Alpine. Well-defined signs that provide adaptation to the lack of oxygen. They have a large chest, high lung capacity, high levels of hemoglobin and red blood cells.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.