Chapter 5 - Anatomy and Physiology and Skin Pages Flashcards
skin is also called the
integument
generic term for an agent that stimulates the development of male characteristics
androgen
very small duct
ductule
state of equilibrium of the internal environment of the body despite changes in the external environment
homeostasis
forming a complex substance by the union of simpler compounds or elements
synthesize
outer layer of skin that is relatively thin over most areas but is thickest on the palms of the hands and the sole of the feet
epidermis
epidermis is composed of several sublayers called
strata
layer of epidermis that is composed of dead, flat cells that lack a blood supply and sensory receptors
stratum corneum
layer of epidermis that is composed of living cells where new cells are formed
basal layer
cells that produce of black pigment called melanin
melanocytes
provides a protective barrier from the damaging effects of the sun’s UV radiation
melanin
a person who cannot produce melanin
albino
second layer of skin that lies directly beneath the epidermis. It is composed of living tissue capillaries, lymphatic vessels, nerve endings, hair follicles, sebaceous (oil) glands, and sudoriferous (sweat) glands
dermis, also called corium
third layer of skin that binds the dermis to underlying structures, composed primarily of loose connective tissue and adipose (fat). Stores fats, insulates and cushions the body, and regulates temp
subcutaneoush layer, also called the hypodermis
oil and sweat glands are called _________ because they secrete substances through ducts to an outer surface of the body
exocrine glands
glands that secrete perspiration through pores and colol the body by evaporation, excrete waste products, and moisten surface cells
sweat glands
third layer of skin that binds the dermis to underlying structures, composed primarily of loose connective tissue and adipose (fat). Stores fats, insulates and cushions the body, and regulates temp
subcutaneous layer, also called the hypodermis
glands that yield an oily secretion called sebum which helps destroy harmful organisms on the skin because of there acidic nature, prevents infection
oil glands
visible part of the hair
hair shaft
part of hair that is embedded in the dermis
hair root
the root, together with it coverings
hair follicle
bottom of the follicle is a loop of capillaries enclosed in a covering
papilla
where each nail is formed, composed of keratinized epithelial cells
nail root
as the nail grows, it stays attached and slides forward over the layer of epithelium
nailbed
