As one of the largest organs in human body, skin bears many functions. It is the body's first line of defense, protecting the body from the external environment. In culture, art, medicine and life, leather also carries rich symbols and meanings.
First, the physiological function of the skin
Protection function: skin is the outermost protective layer of the body to prevent foreign bodies, bacteria and viruses from entering the body. It can also block the harm of ultraviolet rays to the body and maintain the safety of internal organs.
Perception function: The skin is one of the main organs for human body to perceive the external environment, and people can feel external stimuli through touch and temperature perception.
Regulation function: the skin keeps the body running at a constant temperature by regulating body temperature. Sweating and heat dissipation are one of the ways that the skin helps the body to cool down.
Secretion and excretion function: the skin excretes sweat through pores, eliminates wastes and toxins in the body, and maintains the balance of the internal environment.
Second, the significance of skin in culture and symbol
Symbol of tenacity and protection: In many cultures, leather is regarded as a symbol of tenacity and protection. For example, many aboriginal groups make clothes with animal fur, which not only keeps warm, but also symbolizes the respect and utilization of natural resources.
Images in literature and art: In literature and art, skin is used as metaphor and symbol. For example, "walking on thin ice" is a description of danger, suggesting that people should be cautious, just like walking on thin ice.
Signs of identity and characteristics: skin color, texture and other characteristics are often used to represent a person's identity, race, region or physical state. This symbolic feature plays an important role in social communication and identity.
Third, the significance of skin in the fields of medicine and beauty
Skin health: Skin health is directly related to people's appearance and health. Medicine pays attention to the diagnosis and treatment of skin diseases, and the field of beauty pays attention to the beauty care of skin.
Beauty maintenance: skin beauty is an important topic of modern people's concern, and people pursue smooth and delicate skin. Therefore, beauty skin care products and nursing methods are increasingly rich, covering all kinds of skin care procedures and cosmetics.
Fourth, the performance of skin in daily life.
In proverbs, it is often used to describe flexibility and quick response, just like "thick-skinned as iron", which can cope with various challenges.
"If the skin doesn't exist, the hair will be attached": This proverb means that the foundation is unstable and the superstructure can't support it, which emphasizes the importance of the foundation.