The hair follicle is a tube-shaped sheath that surrounds the part of the hair that is under the skin and nourishes the hair. It is located in the epidermis and the dermis. The hair shaft is the part of the hair that is above the skin.

Which structure nourishes the hair cells multiple choice question?

The papilla contains an artery that nourishes the root of the hair. As cells multiply and make keratin to harden the structure, they're pushed up the follicle and through the skin's surface as a shaft of hair. Each hair has three layers: the medulla (meh-DULL-uh) at the center, which is soft.

What structure of the hair contains blood vessels to nourish the cells?

The hair bulb surrounds the hair papilla (See #4 on image), which contains blood vessels to nourish the cells and nerve endings from the dermis.

What is the role of the hair matrix?

The hair matrix produces hair. The hair matrix serves as a sensory receptor. The hair matrix allows hair to "stand-on-end" or become erect. The hair matrix serves as an anchor for the hair shaft.

What are the 2 principal layers of the hair follicle?

Each hair shaft is made up of two or three layers: the cuticle, the cortex, and sometimes the medulla. The cuticle is the outermost layer. Made of flattened cells that overlap like the tiles on a terra-cotta roof, the cuticle protects the inside of the hair shaft from damage.

GCSE Science Revision Biology "Plant Cell Specialisations"

22 related questions found

What are the structures of a 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. These cells work defensively to prevent damage to the hair's inner structure and to control water content of hair fiber.

Which structure is associated with a hair follicle quizlet?

Sensory nerve, wraps around each hair bulb. At bottom of bulb, dermal tissue protrudes into hair bulb, knot of capillaries supplies nutrients and signals hair to grow.

What is produced by hair matrix?

The hair matrix, or simply matrix, produces the actual hair shaft as well as the inner and outer root sheaths of hair.

How is hair produced?

Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin. ... In the hair bulb, living cells divide and grow to build the hair shaft. Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life.

What cells produce the pigment in hair?

Hair has only two types of pigments: dark (eumelanin) and light (phaeomelanin). They blend together to make up the wide range of hair colors. Melanin is made up of specialized pigment cells called melanocytes. They position themselves at the openings on the skin's surface through which hair grows (follicles).

Which type of hair includes scalp hair?

Terminal Hair? Is the long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females. -usually has a medulla, with expectional of gray hair. -Hormonal changes during puberty causes some areas of fine vellus hair to be replaced with thicker terminal hair.

Which layer of the skin contains blood vessels that nourish the substance in the layer?

The dermis contains: Blood vessels that nourish the skin with oxygen and nutrients. The blood vessels also allow immune system cells to come to the skin to fight an infection. These vessels also help carry away waste products.

What is hair and what organ produces it?

What is hair and organ produces it? Hair is an appendage of the skin that grows out of the organ known as the hair follicle.

Which structure is an appendage of the skin?

The skin appendages include sweat glands, nails, and the pilosebaceous unit of the skin, comprised of the hair shaft, hair follicle, sebaceous gland, and arrector pili muscle — these appendages derive from a down growth of the epidermis beginning in the third month of fetal life.

What are the three types of hair produced during a person's lifetime?

Hair follows a specific growth cycle with three distinct and concurrent phases: anagen, catagen, and telogen. Each phase has specific characteristics that determine the length of the hair. The body has different types of hair, including vellus hair and androgenic hair, each with its own type of cellular construction.

What are specialized structures of the human skin?

Skin has three layers: The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands. The deeper subcutaneous tissue (hypodermis) is made of fat and connective tissue.

What is the structure of human hair?

Structure of the hair. Hair is consisted of two distinct structures: follicle—the living part located under the skin and hair shaft—fully keratinized nonliving part above the skin surface. ... Hair shaft is consisted of three layers: cuticle, cortex and in certain cases medulla.

Is hair made of cells?

It starts at the hair root, a place beneath the skin where cells band together to form keratin (the protein that hair is made of). ... But once the hair is at the skin's surface, the cells within the strand of hair aren't alive anymore. The hair you see on every part of your body contains dead cells.

Where are hair cells?

In mammals, the auditory hair cells are located within the spiral organ of Corti on the thin basilar membrane in the cochlea of the inner ear. They derive their name from the tufts of stereocilia called hair bundles that protrude from the apical surface of the cell into the fluid-filled cochlear duct.

What are the main structures of the hair follicle?

The hair follicle is divided into three segments : the infundibulum, the isthmus and the bulb.

• The infundibulum: the top of the follicle. The infundibulum. ...
• The sebaceous gland: lubricating the hair and skin. ...
• The isthmus and pilo-arrector: the mid-section. ...
• The bulb: where it all begins. ...
• The matrix: the hub of creation.

Where would you find matrix producing hair cells?

The hair matrix, which contains the proliferating cells that generate the hair and the internal root sheath, is just above the dermal papilla, and separated from it by a basement membrane.

What consists of hair follicle?

A hair follicle consists of : ... The internal root sheath is composed of three layers, Henle's layer, Huxley's layer, and an internal cuticle that is continuous with the outermost layer of the hair fiber. The bulge is located in the outer root sheath at the insertion point of the arrector pili muscle.

Which hair structure or associated structure is in the epidermis?

Hair: Hair is derived from the epidermis but grows its roots deep into the dermis. Its structure divides into the externally visible hair shaft and the hair follicle within the skin. The hair follicle has an intricate structure that contains the hair bulb that actively divides to extend the hair shaft vertically.

What is hair follicle quizlet?

hair follicle wall is composed of. an outer connective tissue root sheath derived from the dermis, thickened basement (glassy membrane), and an inner epithelial root sheath. hair matrix. actively dividing area of the hair bulb that produces the hair, originate in a region called the hair bulge.

Where are hair follicles found quizlet?

found all over the body with the exception of the palms, soles, lips, and parts of the external genitalia. consists of dead, keratinized epithelial cells and has two main sections. projects the skin from the surface.