Skin Structure
What is the thickness of human skin?
1-2 mm
Hard skin at the ends of fingers and toes:....
nails
Skin color is determined by a chemical called__________________________
melanin
______________are attached to your hairs enabling you to feel the world around you.
nerves
The skin is__________% of your body weight.
6
What are the two layers of skin?
epidermis and dermis
The skin keeps _____________out
harmful bacteria
When we spend more time in the sun than we should, the darkening shows _____________to the epidermis
damage
Sweat glands secrete____________________
perspiration
What degree of burn causes a redness in the epidermis?
1st
The outer layer of skin is made up of what kind of skin cells?
What happens to these cells?
Dead cells are shed and new ones replace them.
The skin keeps______________in.
body fluids and organs
Clumps of skin cells that contain more melanin than the rest of the skin are___________________
freckles
What two things work together to maintain a consistent body temperature?
3rd
Tiny openings called ____________allow ____________to reach the skin's surface.
pores and perspiration
____________is a small bubble of skin that forms when skin is irritated.
____________is thickened epidermis when skin has been repeatedly rubbed in one area
blister
callus
The ultraviolet rays can kill disease-causing bacteria.
blood vessels
What degree causes blisters and damage to the epidermis and dermis?
2nd
bonus point: What makes the hair stand straight?
blood vessels, oil glands, nerves, hair follicles, sweat glands/pores
bonus point: muscle
_______________________ run throughout the skin bringing necessary oxygen and taking away waste products.
blood vessels
How does tanning occur?
The skin produces more melanin which absorbs some rays before they can damage skin cells.
Perspiration on the skin quickly _________________to cool the body.
evaporates
In addition to destroying epidermis and dermis, what is also destroyed in 3rd degree burns?
What is often required for healing?
nerves
skin grafts