Hair Strand Anatomy

The innermost region the medulla is not always present and is an open unstructured region. Cuticle a narrow band of epidermis extending from the nail wall onto the nail surface.

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It is present only in large thick hairs like the ones on our scalps.

Hair strand anatomy. The hair shaft consists of a cortex and cuticle cells and a medulla for some types of hairs. The flatter the shaft the curlier the hair. Learn vocabulary terms and more with flashcards games and other study tools.

The hair bulb forms the base of the hair follicle. The follicle is the essential unit for the generation of hair. A hair follicle anchors each hair into the skin.

Strands of curly or kinky hair are flat. Start studying anatomy chapter 4 integumentary system. The more circular the hair shaft the straighter the hair.

Hair is made of a tough protein called keratin. The natural appearance of hair is attributed to the shape of the hair. The highly structural and organized cortex or second of three layers of the hair is the primary source of mechanical strength and water uptake.

Flexible strand of dead keratinized cells found projecting outside from the epidermis. In the hair bulb living cells divide and grow. Pigment granules can be found in small gaps between these cells.

Cuticle cortex and medulla. The follicle and the hair shaft. Strands of hair originate from the base of the downward extension of living epithelial cells into the dermis that is called the hair follicle.

The amount of natural curl that a hair has is determined by its cross sectional shape. Straight hair has a mostly circular circumference. The innermost layer is called the medulla.

Surrounding the medulla is the cortex elongated cells which form the main fibrous structure and strength of the hair. Hair follicles are surrounded by the dermis but the cells are part of the epidermis and are separated from the dermis by basal lamina layer. Hair follicle has a continuous growth and rest sequence named hair cycle.

Hair shaft sebaceous gland arrector pili muscle hair follicle sweat gland sweat gland duct pore of sweat gland duct. Each strand of hair is made up of the medulla cortex and cuticle. Hair is a derivative of the epidermis and consists of two distinct parts.

As the cortex cells move outwards toward the external layer of hair they become thin and scale like forming the cuticle of the hair strand. Anatomy of human hair shaft consists of 3 layers.

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