Do you think human hair is solid or hollow?

Solid hair is mainly made up of keratin molecules, and the hornin fibers are intertwined with each other through a spiral combination. Hair can be divided into three parts: hair epidermis, hair cortex, and hair medulla. The hair epidermis is a group of flat cells that overlap and overlap into fish scales, which are arranged from the root of the hair to the tip of the hair, and wrap around the cortex inside.

Although this layer is thin, only 10%-15% of the whole hair, it has important properties to protect the hair from the external environment, keeping it dark, shiny and flexible. The hair epidermis is composed of hard keratin, which has a certain hardness but is very brittle, has poor resistance to rubbing, and can easily get injured and fall off when over-combing and using bad shampoo, making the hair dry and dull. The fur cortex is located on the inside of the hair epidermis and is made up of tiny fibrous cells that contain a lot of melanin.

The main component of fibroblasts is keratin, which is made up of amino acids. Many spiral fibrils form small fibers, and then multiple spiral small fibers form large fibers, and then several large spiral fibers form the outer fibers, which is the main body of the fur. The fur cortex is the main component of hair, making up almost 85%-90% of hair.

The melanin contained in the cell is the key to determining the color of the hair, the hair of Chinese is black, this is because of the more melanin of melanin, on the contrary, Europeans and Americans have brown and other colors of hair, because the hair has less melanin. The amount of cortical fibers also determines the thickness of the hair. The hair medulla, located in the center of the hair, is a cavitary collection of cells containing a few melanin particles, arranged in one or two parallel and cubic honeycomb rows.

It has a myriad of pores inside, and these air-saturated pores provide thermal insulation and increase the strength and rigidity of the hair with little to no weight on it. Its job is to protect the head from direct sunlight. Stiffer hair also contains more medulla, and hair and newborn hair tend to have no medulla.

Normal people are solid, but if they are not in good health, or if they are elderly, there will be no more things inside, so it looks like gray hair.

White hair is the color of the hair that is hollow in the middle and then refracted out.

The hair is histologically divided into 3 layers, with the medulla in the center, the cortex on the outside, and the hairy cuticle on the outside.

The middle is empty, but there are still things inside for normal people, and if you are not in good health, or if you are elderly, there are no things inside, so it looks like white hair.

White hair is the color of the hair that is hollow in the middle and then refracted out.

When you've researched it, publish it on your blog!

For the human head is also empty.

Hee-hee. Let's be serious, if human hair is hollow, it is gray hair!!

Brunettes are all solid!!

Fiber: It's solid.

Are you mistaken?