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Structure and Anatomy. Hair is a complex structure composed of several distinct parts that work together to produce, nourish, and maintain each strand. Below is a detailed breakdown of the anatomy of hair, including its visible and non-visible components. Hair Shaft.
The two main types of hair are the shorter and thinner "vellus" hairs (peach fuzz) found on the body and the longer and thicker "terminal" hairs. Examples of terminal hairs include the hair on your head, facial hair, eyelashes, eyebrows, pubic hair, chest hair and belly hair.
Your hair consists of a hair follicle and hair shaft. The hair follicles in your skin contain living cells to allow your hair to grow. The shaft—the part of the hair we see—is made up of dead cells and consists of three different layers.
At the anatomical level, the hair or hair is divided into two clearly differentiated regions: the root and the stem. The root is the region that is under the skin; while the shaft is the visible part of the hair, that is, the extension itself.
Hair is a protein filament that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair.
The part of the hair that is located within the follicle is called the hair root. The root is the only living part of the hair. The part of the hair that is visible above the surface of the skin is the hair shaft. The shaft of the hair has no biochemical activity and is considered dead.
The portion of a hair above the skin is called the shaft, and all that beneath the surface is the root. The root penetrates deeply into the dermis or hypodermis and ends with a dilation called the hair bulb. The only living cells of a hair are in and near the hair bulb.
Hair, in mammals, the characteristic threadlike outgrowths of the outer layer of the skin (epidermis) that form an animal’s coat, or pelage. Hair is present in differing degrees on all mammals. On adult whales, elephants, sirenians, and rhinoceroses body hair is limited to scattered bristles.
Structure and Function. Hair serves many functions, including thermoregulation and protection. In animals and nonhuman primates, hair maintains temperature by retaining heat or preventing cold. Hair can also provide camouflage and serve as a sexual attractant. In humans, hair is thinner and lighter than in primates.
Hair is a skin derivative and has protective and thermoregulatory functions. It has two parts the hair follicle (living) and the hair shaft (non-living). Hair is made up of keratin protein and COHNS. The hair shaft has three layers, the outermost cuticle, the middle cortex, and the innermost medulla. Hair follicle is the generative part of the ...