Skin Layers and their functions
the outermost layer of the skin
The Epidermis
Skin color depends on this for it's pigment
melanin
The fibrous connective tissue from protein that gives the skin form and strength.
collagen
The skin contains two types of glands that extract materials from the blood to form new substances, these are called...
the sudoriferous and the sebaceous glands
The skin has this many principle functions
6
The layer that is 25 times thicker than the epidermis; also the second layer of skin
The Dermis
The two types of nerves
motor and sensory
Most scientists believe that signs of aging are caused by ________ over one's lifetime.
Sun exposure
The sudoriferous glands, also known as what
sweat glands
The healthy internal temperature of the human body
98.6 degrees F
The subcutaneous layer is made up of this type of tissue
subcutaneous tissue
These produce melanin
melanocytes
This makes elastin and collagen fibers weaken
gravity, pregnancy, weight gain, and constant pulling
sebaceous glands
The skins' pH protects the body from what?
Pathogens
The dermis's reticular layer contains this many structures within it's network
7
Secretary nerve fibers are...
motor nerves attached to sweat and oil glands
Elastin and collagen make up this percentage of the dermis
70
A fatty or oily substance that lubricates the skin and preserves skins' softness.
sebum
The epidermis' protective barrier made up of sebum, lipids, sweat, and water.
the acid mantle
The five layers of the strata, (stratum for plural)
Stratum corneum, Stratum lucidum, Stratum granulosum, stratum spinosum, and stratum germinativum
Melanin production is stimulated by exposure to sunlight and protects the cells below by ______ and _____ UV radiation
absorbing; blocking
The word collagen comes from the Greek words kolla and genna, meaning what
Kolla; glue Genna; to produce
Suderiferous glands are mostly present on these specific parts of the body
palms of hands, soles of feet, the forehead, and the underarms.
The skins' six principle functions are...
protection, sensation, heat regulation, excretion, secretion, and absorption.