What is cross section of hair?
On the scalp the profile or cross-section of individual hair-shafts results in different hair types. It is the shape, size and curve of the follicle that determines the profile of each hair. The follicle is an extension of the epidermis into the dermis layer of the skin.
What are the three cross sections of hair?
The hair shaft is comprised of three layers: the cuticle, cortex, and medulla. The cuticle is the hair’s outer most layer which has shingle or scale like cells that overlap.
What are the 3 layers of a hair follicle?
Each hair shaft is made up of two or three layers: the cuticle, the cortex, and sometimes the medulla.
What are the parts of a hair follicle?
The hair follicle can be divided into 3 regions: the lower segment (bulb and suprabulb), the middle segment (isthmus), and the upper segment (infundibulum). The lower segment extends from the base of the follicle to the insertion of the erector pili muscle (also known as the arrector pili muscle).
Can you pull out hair follicle?
However, there’s no need to worry, as it’s virtually impossible to pull out a hair follicle. Hair will typically grow back just as it was before unless it was from a follicle that has stopped producing hair. A hair follicle is a permanent part of the skin situated in the epidermis, or the skin’s top layer.
What is the cross-section shape of African hair?
Caucasian hair is generally straight or wavy and is the thinnest, while its cross-section is relatively elliptic. As for African hair, it is very curly, its thickness is intermediate and the shape of cross-section is highly elliptic.
What are the two sections of hair?
Hair is a derivative of the epidermis and consists of two distinct parts: the follicle and the hair shaft. The follicle is the essential unit for the generation of hair. The hair shaft consists of a cortex and cuticle cells, and a medulla for some types of hairs.
What is the medulla in the hair?
The medulla, only present in thicker hair types, is the innermost layer of your hair. It consists of a soft, thin core of transparent cells and air spaces.
Are hair follicles in the papillary layer?
The papillary dermis is the superficial layer, lying deep to the epidermis. The papillary dermis is composed of loose connective tissue that is highly vascular. The dermis houses blood vessels, nerve endings, hair follicles, and glands.