1) Protective. Protects against mechanical, chemical and biological (penetration of microorganisms) damage. 2) Excretory. Sweat secreted by the skin contains metabolic products, excess salts and water. 3) Thermal regulation. Subcutaneous adipose tissue prevents hypothermia, sweat glands – overheating. 4) UV protection. 5) Activation of vitamin D. 6) Receptor.
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.