trichology:

• the study of hair

• the study of feet

• the study of the nervous system

• the study of bones

hair root:

• located below the epidermis

• located above the epidermis

• located below the hair bulb

• located above the dermal papillae

hair shaft:

• located below the epidermis

• encases the hair strand

• projects above the epidermis

• tube-like structure in the skin or scalp

hair follicle:

• located at the base of the follicle

• tube-like structure in the skin or scalp; surround the hair root and anchors the hair

• projects above the epidermis

• cone-shaped elevation at the base of the hair bulb

hair bulb:

• supplies nutrients that allow the hair to grow

• tube-like structure in the skin or scalp; surrounds the hair root

• located at the base of the follicle; contains living cells

• involuntary muscle; goosebumps

dermal papillae:

• tube-like structure in the skin or scalp

• cone-shaped elevation at the base of the hair bulb

• located below the epidermis

• the study of hair; diseases and care

arrector pili muscle:

• cone-shaped elevation at the base of the hair bulb

• involuntary muscle in the dermis; goosebumps

• tube-like structure in the skin or scalp

• attached to the hair follicle

sebaceous glands:

• cone-shaped elevation at the base of the hair bulb

• sweat glands

• attached to the hair follicle; produce a substance called sebum

• located at the base of the follicle

sebum:

• cone-shaped elevation at the base of the hair bulb

• involuntary muscle; goosebumps

• sudoriferous glands produce

• lubricates the hair and skin

hair cuticle:

• located at the base of the follicle

• fibrous protein layer of the hair

• outermost layer; formed from cells that overlap

• known as the hair's pith or core