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Review terms related to the skin and its accessory organs


any small opening in the skin or outer surface of an animal

hair shaft

the part of the hair that projects up from the skin's surface and is visible above the surface of the skin

hair root

the part of the hair contained within the follicle, below the surface of the skin

hair follicle

a tubelike pocket of epidermal cells that extends into the dermis and in which a hair develops; composed of epidermal cells

dermal papillae

fingerlike projections of the dermis into epidermis that account for the unique fingerprints.

sudoriferous glands

glands in the skin that secrete watery secretions (sweat), which contain salts and nitrogenous wastes

eccrine glands

secrete watery secretions for thermoregulation; ducts empty secretions directly into pores and onto outer surface of epidermis


outer layer of skin that consists stratified squamous epithelium


the deep vascular inner layer of the skin that consists of dense fibrous irregular connective tissue

arrector pili

a smooth muscle attached to hair follicles that causes "goose bumps" to appear on the skin when contracted


a layer beneath the skin, which contains adipose tissue and loose areolar connective tissue; binds skin to underlying muscles

sebaceous glands

glands that secrete an oily secretion into the hair follicle that lubricates the hair and skin and discourages the growth of bacteria on the skin

ceruminous glands

Modified sweat glands of the external ear canal that secrete ear wax

mammary glands

modified sweat glands that produce milk to feed the young in response to certain hormones after childbirth

apocrine glands

glands that secrete their sticky odorous secretions into hair follicles; they become active at puberty


The thick proximal nail fold that lies over the nail root.

nail bed

portion of the skin on which the nail body rests


thickened stratum corneum of the epidermis that lies underneath the free edge of the nail

nail body

The visible part of the nail that attaches it to the skin.


the half-moon shaped, whitish area at the base of a nail where there is a thicker germinal layer

free edge

Distal end of nail not in contact with the skin

nail root

the proximal end of a nail lying beneath the skin

nail matrix

Thickened portion of stratum basale proximal to the nail root and is responsible for nail growth


What is B?


What is G?


What is C?

free edge

What is F?

nail body

What is D?

nail root

What is A?

nail matrix

What is E?


Which number points to arrector pili?


Which number indicates sudoriferous gland (duct)?


Which number represents dermis?


Which number is used to label stratum corneum?

sebaceous gland

What is number 2?


Which number points to the sensory receptor?

hair shaft

What is labeled with number 4?

hair follicle

What is number 8?


What number is used to indicate epidermis?


Which number points to adipose tissue?

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