Why do fingernails and toenails keep growing?

Nails are actually a hard substance called keratin, which is also the building block of hair. These spheroids can continue to absorb nutrients and maintain growth.

Nails accompany a human being for almost a lifetime. At about 20 weeks in the mother's womb, the tips of the little fingers begin to form a crust, and the fetus is born with intact nails covering the fingers and feet with the rest of the new life. After the formation of the nail root, the keratin cell spheroids are squeezed into the newly formed cell spheroids, which slowly advance forward and extend from ** to the outside.

The older cell globules flatten and harden to become a hard protective layer, which is often referred to as the "nail cover".

The appearance of nails not only maintains the original function of the fingers and fingers of the feet, but also strengthens their ability. When the fingers hold the wood, because the nails are hard shells, the flesh pads of the fingers and feet are flattened and become flatter, and this simple action of flattening expands the surface area of the fingers in contact with the wood, and primates, including our ancestors, carry greater self-confidence to move around the tree and get more abundant food.

Fingers covered with nails and fingers of feet are especially time-saving and energy-saving when looking for food. Observations from the Duke Lemur Heart Fossil Center in North Carolina show that "primates are particularly adept at finding fruit at the edge of branches compared to other tree animals, where it is difficult to catch food."

Nails also have a protective function. Like a small protective cover, the fingernails cover the exposed tips of the fingers and feet. We have thousands of nerves on our fingertips.

Nerves are very sensitive tools for detecting the world around us. In order not to impair the sensing function, the nail plays an important role.

If the nails are damaged or destroyed and cannot be regenerated, it can be an infinite disaster for sensitive fingertips. So, growing and alternating nails will bring us more benefits. If the nail is injured, it can elongate again, and even if it is pulled out, if the nail root is still there, it can grow again, and the recovery time is not too long.

Thanks to the nails that continue to elongate, our watery fingertips are always gently protected.

Because our body has adapted to this growing nail, although nail growth is a resource-intensive process, because they absorb nutrients and constantly ** nail growth elements. So that the nail will continue to grow no matter if it is cut or plucked.

Fingernails and toenails, like our hair, are an indispensable part of the body, because the body needs to constantly metabolize, so they will keep growing.

Nails and toenails** are the outermost keratinized epithelium of the human body**, which is very tight and makes up the strong toenails, and their main component is a protein called keratin.

Is it because of the high calcium content of the toenails? The answer is no. After the measurement of precision instruments, it was found that the calcium content in the toenail was very low, accounting for only about its weight.

In fact, what determines their hardness is the high-sulfhydryl protein in the toenail keratin. In addition, the water content in the fingernail is less than that in **, which is also a reason for its greater hardness. Sturdy toenails provide great protection for the ** underneath them.

Toenails grow every day. Interestingly, the growth rate of toenails varies from one part to the next. The nails of the right hand grow faster than the nails of the left hand. Toenails grow slower than fingernails, growing at a rate of about 1 3 1 2 as fingernails.

The growth rate of nails in the same hand is also different, generally the longer the finger, the faster the nail grows, from fast to slow is the middle finger, index finger, ring finger, thumb and little finger.

The growth rate of fingernails is related to the temperature, and the higher the temperature in the summer, the faster they will grow. When nutrition is good, toenails will also grow faster; When a person is healthy and happy, the local blood flow to the toenails increases, providing more nutrients, and the toenails not only grow faster, but also appear smooth and shiny.

The growth rate of toenails is also related to the age of the person, etc. Children are in the stage of growth and development, so their toenails grow faster, and the baby's nails grow about millimeters per week. var _hmt = hmt ||function()