Exercise 3.1 The Integument Quizlet #1

sebacious glands

Oil Glands, found everywhere except palms and soles, secrete sebum (oil), they are holocrine glands (explode, releasing contents),

arrector pili muscle

An involuntary muscle fiber attached to the underside & base of the hair follicle

pacinian corpuscles

respond to deep pressure and vibration

dermal papillae

a fingerlike projection of the dermis that may contain blood capillaries or Meissner corpuscles (of touch)

Meissner's corpuscles

sensitive touch receptors in the dermis

appocrine sweat glands

found in axillary and anogenital regions and secrete their product into hair follicles. contribute to body odor

eccrine sweat glands

respond primarily to elevated body temperature

stratum corneum

the most superficial layer of the epidermis consisting of dead cells

stratum basale

the deepest layer of the epidermis consisting of stem cells capable of undergoing cell division to form new cells

follicular (hair) papilla

located within the root / bulb

-contains nerves and blood vessels which provide nourishment for the hair

internal root sheath

surrounds the hair root and the deeper portion of the shaft

external root sheath

outer layer of the hair follicle that is an extension of the epidermis, which encloses the hair root

hair bulb

The rounded, club-shaped part of hair located at the end of the hair root