What is the structure of hair like? Is it empty?

Polar bears are hollow.

Structure of the hair:

Each hair is composed of an epidermal scale, cortex, and medulla layer. The epidermal scale layer is the outermost layer of the hair and usually consists of 2 or 4 layers of scales.

The epidermis is usually translucent or colorless, so it allows natural hair color to shine through; The cortex makes up 80% of the hair, where the natural pigment is deposited, and the natural hair color is presented; The medullary layer is located in the center of the head and consists of many small bubbles.

What is the hair structure like? What does it consist of?

Hello dear, the structure of the hair: Each hair sock is composed of the epidermal scales, the cortical layer, and the medullary layer. The epidermal scale layer is the outermost layer of the hair and usually consists of 2 or 4 layers of scales.

The epidermal layer is usually translucent or colorless. Hair is made up of two parts: the root and the hair slowdown. The part of the hair that is under the scalp is called the roots, which are not visible to people and are protected by hair follicles.

Hair is a specialized tissue formed by keratinocytes of the epidermis.

In terms of tissue structure, hair is made up of two distinct parts, hair and follicles.

On the outer surface, hair is made up of roots and hair shafts, the part that exposes the scalp is the hair shaft, and the part below the scalp is the hair root, which is encased inside the hair follicle.

Hair shaft and hair roots.

It is a special part of the epidermis that grows outward, and the main component is keratin. The hair shaft is the hair that exposes the scalp and accounts for 85% to 90% of the total hair weight; The root of the hair is located under the scalp, and the hair inside the hair follicle, which accounts for only 10% of the total hair weight, is connected to a structure called the hair bulb in the lower part of the hair follicle.

The cortical layer is made up of helical protein chains, each of which is tightly bound together. The position of the protein chains determines the shape of the hair, and certain types of connections, such as those of hydrogen and salt, can easily change the shape of the hair, so that the hair can temporarily change its shape, such as when wet, but the binding of the protein chains of the dioxide bonds is quite strong and chemicals must be used to achieve a long-lasting shape change.

The medulla layer is the central layer of the hair and is irrelevant for perms, it is the thickness of the hair that determines it.

Epidermal layerThe epidermis is the outermost layer of the hair and is composed of 6 to 12 layers of transparent or translucent substances that adsorb each other and protect the inner layer of the hair.

Hair is made up of filaments made up of fibrin, 50% of which is in a helical structure, and the matrix is composed of non-spiroplasmic proteins rich in cystine. It is the same as a nail.