Structure Of Hair | Hair Root, Hair Shaft, Hair Follicles, Dermal Papillae | Layers Of Hair | Hindi

Structure Of Hair | Hair Root, Hair Shaft, Hair Follicles, Dermal Papillae | Layers Of Hair | Cuticle | Cortex | Medulla
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Human hair .....
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.
Types of human hair .....
Forensic scientists distinguish six types of hair on the human body: (1) head hair, (2) eyebrows and eyelashes, (3) beard and mustache hair, (4) underarm hair, (5) auxiliary or body hair, and (6) pubic hair. Each hair type has its own shape and characteristics.
Parts of human hair .....
1) Hair Root
2) Hair Shaft
Hair Root .....
A hair follicle is a tunnel-shaped structure in the epidermis (outer layer) of the skin. Hair starts growing at the bottom of a hair follicle. The root of the hair is made up of protein cells and is nourished by blood from nearby blood vessels.
Dermal Papillae .....
Dermal papillae are fingerlike projections arranged into double rows, increasing the surface area between the epidermis and dermis, thereby strengthening the juncture with the epidermis and increasing the amount exchange of oxygen, nutrients, and waste.
Malenocyte cells ......
A cell in the skin and eyes that produces and contains the pigment called melanin. Enlarge. Anatomy of the skin, showing the epidermis, dermis, and subcutaneous tissue. Melanocytes are in the layer of basal cells at the deepest part of the epidermis.
Hair muscle ....
Arrector pili muscle ....
Arrector Pili Muscle - This is a tiny muscle that attaches to the base of a hair follicle at one end and to dermal tissue on the other end. In order to generate heat when the body is cold, the arrector pili muscles contract all at once, causing the hair to "stand up straight" on the skin.
Sebaceous glands ....
A sebaceous gland is a microscopic exocrine gland in the skin that opens into a hair follicle to secrete an oily or waxy matter, called sebum, which lubricates the hair and skin of mammals.
1) Cuticle
The hair cuticle is the outermost part of the hair shaft. It is formed from dead cells, overlapping in layers, which form scales that strengthen and protect the hair shaft. While the cuticle is the outermost layer, it is not responsible for the color of the hair.
2) Cortex
The cortex of the hair shaft is located between the hair cuticle and medulla and is the thickest hair layer. It also contains most of the hair's pigment, giving the hair its color. The pigment in the cortex is melanin, which is also found in skin.
3) Medulla
The medulla is the innermost layer of the hair shaft. This nearly invisible layer is the most soft and fragile, and serves as the pith or marrow of the hair.
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Structure of hair
Structure of hair in hindi
Parts of hair
Parts of hair in hindi
Hair roots
Hair shaft
Hair follicles
Dermal Papillae
Arrector pili muscle
Sabeceous glands
Layers of hair in hindi
1) Cuticle
2) Cortex
3) Medulla
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#structureofhairinhindi
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#cortex
#medulla
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