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Integumentary System

SKIN

QuestionAnswer
What are the parts of the integumentary system? Skin, hair, nails, sweat glands, and sebaceous glands
What are the three layers of skin? Epidermis, dermis, and subcutaneous layer
What is a 1st degree burn? Skin reddened and painful; no blisters; epidermis is damaged
What is a 2nd degree burn? Skin reddened and painful; both epidermis and dermis are damaged
What is a 3rd degree burn? Charred; epidermis and dermis are burned away; subcutaneous layer is exposed
What are the functions of the integumentary system? Two-way protective barrier, temperature regulation, houses sensory receptors, and secretes important fluids
What is the largest organ in the body, and how much does it weigh? Skin, and more than 20 lbs (in adults)
Skin is also called...? Integument, and Cutaneous membrane
Sensory receptors are located in...? Middle layer - Dermis
What do sensory receptors detect? Temperature, pain, touch, and pressure
Sweat glands...? 1) Assists body in maintaining internal temperature 2) Create cooling effect when sweat evaporates
Sebaceous glands...? 1) Oil glands 2) Produce sebum 3) Lubricates the skin surface
Temperature regulation 1 To cool skin...? 1) Sweat evaporation 2) Dilate superficial blood vessels to release heat
Temperature regulation 2 To conserve heat...? 1) Constrict superficial blood vessels to keep warm blood away from surface 2)Continuous fat layer acts as insulation
Epidermis Thin outer membrane layer, and composed of stratified squamos epithelium
Dermis Middle, fibrous connective tissue layer, and composed of collagen fibers (also known as "corium")
Subcutaneous Layer Innermost layer of fatty tissue and fat cells called lipocytes (also known as "fascia" or "hypodermis")
What is the Basal layer? The deepest layer of the epidermis
What are Melanocytes? Special cells or basal layer, and produce black pigment melanin
What do Melanocytes do? 1) Protects against UV rays from the sun 2) Gives skin its color
Hair is made up of...? Hair follicle, hair root, hair shaft, arrector pili muscle
What is the arrector pili? 1) Slip of smooth muscle 2) Causes hairs to "stand up"
Nails are made up of...? Nail body (flat bed of keratin), nail bed (connects nail body to underlying tissue), and lunula (half-moon white area at base of nail)
Created by: studycat057