What do human nails do, what do human nails do

1. It has a "shield" effect, which can protect the distal fingertips from damage and maintain their stability;

2. Enhance the sensitivity of finger touch, assist in grasping, coercing, pinching and squeezing;

3. It enriches the blood supply of the nail bed and regulates the peripheral blood supply and body temperature.

Nails are flattened nail-like structures on the back of human fingers, which are the products of keratinization of the epidermis of the finger tips and play a protective role in protecting the finger tips.

Traditional Chinese medicine says that the liver is in the claw, the color and shape of the nail can reflect the function of the liver, "the claw is the tendon", the claw depends on the nourishment of the liver blood, the liver blood is sufficient, the nail is rich in nutrients, the nail will be tough and ruddy. The main components of nails are keratin, calcium, and if the calcium content is insufficient, it can also affect the appearance of the nails. Nails mainly play a protective role on the fingers and toes, and its texture is relatively hard, which can effectively protect the fingertips and fingertips in life.

Changes in nails can effectively reflect a person's physical condition, so it is important to pay attention.

Human nails are a good way to protect your fingers. Another nail can be easily used for you to poach, and the other shell. Near features. The second is to be able to look good.

Human nails can protect the tenderness of the fingers and scratch the itch

Human nails mainly play a role in protecting the fingers.

Holding the finger clamp has a good protective effect on the fingers, and it can make the fingertips use force. I enable a finger to grasp a very small thing. It can enhance the sensitivity of finger touch and assist in grasping, pinching, pinching and squeezing.

Nails are mainly a keratin protein, so they are high in nitrogen. Just because nails are hard doesn't mean that the calcium content in nails is high, but the calcium content in nails is not very high.

The function of the nail is mainly to protect the nerve-rich fingertips from injury. Protein, keratin and sulfur are the main building blocks of nails, which are about millimeters long each week. Abnormal changes in the nails are associated with a deficiency of various cantyloids.

In order to adapt to the living environment, humans originally evolved to have nails to facilitate climbing, fighting, and to assist the mouth in eating. Later, with the continuous evolution of human beings, our nails are not as hard and long as before, and now our nails are mainly to protect the fingers. Nails will continue to deteriorate, because when we no longer need to use them, they lose their original function and will slowly degenerate.

Man is an evolved animal. The ancestors of mammals are reptiles.

When crawling on all fours, the nail acts as a protective act, and it can be worn and regrown. In addition, it also has a certain role in the process of predation and grasping.

The vast majority of mammals retain the fingernail feature, which shows that it plays an important role in mammals, but there are some differences in morphology, such as the claws of carnivores and the hooves of herbivores.

Although the human nail does not have many practical functions, it has been retained in evolution. There is still a certain function in life.

Nails grow from the base, which is an accumulation of dead cells, which belong to keratinized cells, which we call keratin. The main ingredient is keratin, which is colorless and translucent. The main components of hair and animal feather horns are keratin, but they contain pigments.

The main function of the nail is to protect, protect the soft nail bed under it from damage at work, and help the fingers to complete more delicate movements.

Nails are flattened nail-like structures on the back of the fingers (toes) of humans and apes, which belong to connective tissue. It is a deformation of the claw, also known as the flat claw, and its main component is skin keratin. Homologous to the claw, the claw plantar retracts, and the claw plate forms a rectangular sheet, which is the product of epidermal keratinization at the end of the finger (toe) and plays a role in protecting the end of the finger (toe).

Nails, also known as claw nails, are tight, solid keratotic cortex located on the extensor surface of the ends of the fingers or toes.

Nails are derived from **. Like **, it is formed by the gradual differentiation of the mesenchyme of the embryonic body surface, ectoderm and lateral plate wall layer and somite raw dermal segment after 9 weeks of embryonic life. The nail is divided into the nail plate, nail bed, nail fold, nail groove, nail root, nail epithelium, and subungual skin.

Refers to the growth of the nail:

The growth rate of the nail is related to the length of the terminal phalanx (the outermost phalanx). As a result, the nails of the human index finger grow faster than the nails of the little finger. In humans, the average growth rate of a nail is about millimeters per month, which is about half the rate of growth of a toenail and an average of about a millimeter per month.

It takes 3 to 6 months for nails to fully grow, while toenails take 12 to 18 months. The actual growth rate depends on age, gender, season, exercise level, diet and genetic factors. The longest known female nail chain is centimeters in total length, with an average centimeter per fingernail.

Contrary to popular belief, nails do not continue to grow after death. Dehydrate and tighten to make the nails look longer.

The above content refers to Encyclopedia - Nails.