- Thickest stratum of the epidermis. - Named due to the spiky appearing cells. - help to synthesize vitamin D.

Sensory neurons that contribute to the sensation to the environment.

HAIR STRUCTURE

structure at the deep end of the fair follicle.

- Superficial layer - Consist of loose connective tissue - Collagen fibers anchor dermis and epidermis together.

- it gives yellow-orange pigment - Lipid-soluble molecule - usually ingested in diet.

serving as an enclosing barrier and providing environmental protection, regulating temperature, producing pigment and vitamin D, and sensory perception.

- deliver essential nutrients and oxygen to the rapidly dividing cells in the hair bulb and follicle, ensuring the metabolic demands of active hair growth are met.

It is the outermost layer of the skin and contains no blood cells

tiny bands of smooth muscle that cause hair to stand up when they contract,

Houses of blood supply.

Animal weight skin

- deepest layer of the epidermis. - Richest supply of blood - Also known as Stratum Germinativum.

Enfolding surrounding of the hair root.

- Most superficial layer of the epidermis. - Several layers of dead, fattened keratinocytes.

- Blood vessels and accessory structures (hair, sweat glands and sebaceous gland) - Sensory receptors.

project from the surface of the skin

hair to stand up when they contract, this is known as?

body's outermost layer, which includes the skin, nails, hair, and glands. It functions to protect your body from the outside world.

Give color to the skin

- Found in thick skin (Kalyo) - Clear layer of dead keratinocytes

produced by melanocytes in the stratum basale.

- Gives pinkish hue in skin - Protein found in red blood cells.

Dermis: Layers

forms the inner layer of the skin and is much thicker than the epidermis (1-5mm)

How much thick is the dermis

- Middle layer of the epidermis - 3-5 rows of cells - named for prominent granules - excretes a lipid based substance.

largest organ

STRARA type

– indentation at the base of the hair bulb that contains blood vessels.

the skin consists of the following structures:

Are hard structures located at the end of digits that contain hard keratin.