Question | Answer |
LANUGO | Delicate, unpigmented hair that cover the 5-6th month old fetus. |
TERMINAL HAIRS | Long, coarse, and pigmented hair that replaces lanugo on the scalp, eyelids, and eyebrows and in various areas at puberty. |
VELLUS HAIRS | Short, fine, and unpigmented hair that replaces the lanugo on the rest of the body. |
SHAFT OF HAIR | Part of the hair that protrudes above the skin surface. |
ROOT OF HAIR | The part of the hair below the surface of the skin. |
MEDULLA | The central axis of the hair that contains soft keratin. |
CORTEX | The large middle layer of the hair that contains hard keratin. |
CUTICLE | A single layer of cells that forms the surface of the hair. |
HAIR BULB | An expanded knob at the base of the hair root which contains the blood vessels for nourishment of the hair matrix which is where new hair forms. |
MATRIX | Inside the hair bulb; undifferentiated cells that form new hair. |
ARRECTOR PILI MUSCLE | Attached to the hair follicle; produce "goosebulbs" |
SEBACEOUS GLANDS | Holocrine glands associated with the hair follicle; oil glands; prevents drying and protects against bacteria. |
SEBUM | Oily, white substance rich in lipids. |
SUDORIFEROUS GLANDS | Sweat glands |
ECCRINE/MEROCRINE SWEAT GLANDS | Most common type of sweat gland; regulate temperature |
APOCRINE SWEAT GLANDS | Sweat caused by emotional responses which has an odor (odorless at first, then bacteria attack it and an odor appears). |
CERUMINOUS GLANDS | Earwax glands |
NAIL ROOT | Part of the nail covered by skin |
NAIL BODY | Visible portion of the nail. |
NAIL MATRIX | Part of the nail beneath the nail fold |
NAIL BED | The skin beneath the nail. |
HYPONYCHIUM | Beneath the free edge of the nail body. |
EPONYCHIUM | The cuticle. |
LUNULA | The whitish crescent-shaped area at the base of the nail. |