Chapter 5: The Integumentary System Flashcards
What are the functions of the skin?
protection, excretions, maintain body temperature, sensation, Vitamin D production
Integument
skin
What is another term for skin?
cutaneous membrane
What is the integumentary system?
skin and accessory structures
What are the accessory structures?
hair, nails, skin glands
What are the layers of skin?
epidermis and dermis
subcutaneous layer
separates skin from the underlying organs
What are the general components of the skin?
epithelial tissue, connective tissue proper, hair, glands, muscles, blood vessels, nervous tissue
What is the epidermis made of?
stratified squamous epithelium
True or false: the epidermis is not keratinized
false
How many layers does the epidermis have?
4-5
Where is the epidermis the thickest?
plans, fingertips, and soles of the feet
How many dead cell does the average person shed every minute? How many lbs in their lifetime?
50,000
40lbs
What are the layers of the epidermis?
Stratum corneum
Stratum granulosum
Stratum spinosum
Stratum basale
What is the Stratum corneum made of?
20-30 layers of dead flattened cells filled with keratin
How many layers of flattened cells does the Stratum granulosm have?
5 layers
What is the Stratum granulosum composed of?
deteriorating organelles and cytoplasm full of granules
What is the Stratum spinosum made of?
several layers of keratinocytes
What do the cells in the Stratum spinosum contain?
pre-keratin molecules
What is the Stratum basale made of?
one layer of mitotically active stem cells
