Chapter 5- Skin and Body Flashcards
(107 cards)
adip/o
fatty
cutan/o
skin
dermat/o, derm/o
skin
hidr/o
sweat
ichthy/o
fish, scaly
kerat/o
horny tissue
lip/o
fatty
melan/o
black, very dark
myc/o
fungus
onych/o
nail
pil/o
hair
seb/o
sebum, sebaceous glands
steat/o
fat
trich/o
hair
xanth/o
yellow
xer/o
dry
The skin or _____ is the largest body organ. The average adult has about 21.5 sq ft of skin. It varies in thickness depending on what part of the body it covers and what its function is in covering that part.
integument
The skin has three main parts or layers: the _____, the _____, and the _____ or ______.
epidermis; dermis; subcutaneous layer; hypodermis
the epidermis, the _____ layer of skin, ranges from 1/200 to 1/20 of an inch thick and consists of several _____.
outer strata
the epidermis is made up of cells called _____, a flat, scaly layer of cells. The layers that make up the squamous epithelium are called ______.
squamous epithelium; stratified squamous epithelium
Not all parts of the body’s skin contain all the sublayers of epidermis. The top sublayer is called the _____. Its consists of a flat layer of dead cells arranged in parallel rows. As new cells are produced, the dead cells are sloughed off.
stratum corneum
As they die, the cells in the stratum corneum fill with _____, a waterproof barrier that keeps microorganisms out and moisture in. The keratin of the epidermis is softer than the hard keratin in nails.
keratin
The bottom layer of the epidermis is called the _____. Here new cells are produced and pushed up to the stratum corneum. THe epidermis itself is a nonvascular layer of skin, meaning that it does not contain blood vessels.
stratum germinativum
Specialized cells called ______ produce a pigment called _____, which helps to determine skin and hair color. Melanin is essential in screening out ultraviolet rays of the sun that can harm the body’s cells.
melanocytes; melanin