Integumentary System Flashcards
What is the largest organ of the body?
How much is that of your body weight?
Skin, 16%
What does the integumentary system include?
Skin, hair, nails, and excretory glands
What are the 2 parts of the cutaneous membrane?
Epidermis, dermis
What are the 3 parts of the accessory organs?
Hair, nails, and excretory glands
What is the fat later protecting major blood vessels?
Subcutaneous layer
What is the scientific name for the subcutaneous layer?
Hypodermis
What are 6 functions of integument?
- Protection
- Excretes salt
- Maintains body temp.
- Formation of vitamin D
- Storage of nutrients
- Touch receptors
What are 2 function of the epidermis?
- Protection
2. Keeps out micro organisms
What causes hardening in the epidermis?
Keratinocytes
What are the thickest parts of the epidermis?
Palms and soles of feet
What are the thinnest parts of the epidermis?
Eyelids and belly button
What cells are sensitive to touch?
Merkel cells
What cells are brown pigment cells?
Melanocytes
Deepest layer, created epidermal ridges, don’t change over time, contains stem cells, cell will go under mitosis, contains merkel cells and melanocytes
Stratum balsale
Above the basale layer, contains langerhans cells, cells are still dividing
Stratum spinosum
Above spinodum, cells don’t divide, make keratin
Stratum granulosum
Only found in thick skin areas, thin, flat, and clear, densely packed filled with keratin
Stratum lucidium
Surface layer, 15-20 layers thick, water resistant, keratinized
Stratum corneum
What cells fight infection?
Langerhans cells
What protects and hardens skin, hair, and nails?
Keratin
What are hardened and protective cells?
Keratinized cells
Layers of the skin from the deepest layer to the outside layer.
Stratum balsale, stratum spinosum, stratum granulosum, stratum lucidium, and stratum corneum
What layer of skin protects?
Epidermis or hypodermis
What layer of skin excretes salt?
Dermis
What layer of skin maintains body temp?
Hypodermis
What layer of skin forms vitamin D?
Epidermis
What layer of skin stores nutrients?
Hypodermis
What layer of skin has touch receptors?
Dermis
Gradual evaporation throughout the day
Insensible
Sweat out of glands
Sensible
2 things skin color is caused by
Epidermal pigment, dermal circulation
Pigment that is orangish and yellow. Can be changed to vitamin A. Help with vision
Carotene
Pigment that is brownish yellow blackish. Protects against UV Rays, levels change when exposed to sunlight
Melanin
Pigment that is Reddish pink. Found in blood, carries oxygen
Hemoglobin
Vessels that are flushed skin (red)
Dialated vessels
Vessels that are cyanosis (blue)
Constricted vessels
Contains dermal papilla, sensory neurons and capillaries
Superficial papillary