Integumentary System #1 Flashcards
Functions of the Integumentary System
Covering
Regulate Body Temperature
Helps manufacture vitamin D
Nerve receptors
Screenout ultraviolet radiation
Temporary Storage
Special absorptive properties
Melanin
Determines the various shades of skin color
Palms and Soles
Part of the body with the thickest skin
Fingerprints
They are epidermal ridges
Vitamin D Importance
Protects against UV radiation
Ultraviolet Radiation
Causes DNA mutations and burns that lead to cancer and wrinkles
Keratin
Protein that renders the skin dry and provides waterproof covering ; fibrous protein that makes up hair and nails
Keratinocytes
Comprises most of the epidermis and produces keratin
Merkel Cells
Sensory receptors for touch
Melanocytes
Makes melanin, which helps protect the skin again UV r rays from the sun
Langerhans Cells
Macrophages that are effective in the defense of the skin against microorganisms
Epidermis
Outermost layer of the skin
No blood vessels
Avascular
Stratum Corneum
Layer of the epidermis that is considered to be exposed to the surface of the skin
Liver
Organ that is most affected by jaundice
Cyanosis
Lack of oxygen
Epidermal Growth Factor
Used in labs to produce skin grafts
Pituitary Gland
Addison’s disease is a disease of this gland
Subcutaneous; hypodermal layer
Layer of the skin that contains fatty tissue
Dermis
Layer of the skin that contains the blood vessels and nerves
Carotene
Orange-yellow pigment
Vitiligo
Loss of melanocytes
Eyelids
Part of the body where skin is the thinnest
Insensible Perspiration
The loss of water through the skin, which does not occur as perceivable sweat.
