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22 Cards in this Set
- Front
- Back
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This is the largest organ system of the body
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Skin
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Skin comprises how much of the body weight?
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15-20%
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Functions of the skin
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1. Protection of the underlying body structures against injury or invasion
2. Maintains homeostasis (like balancing fluid and temp. regulation) 3. Aids in elimination/excretion (e.g. salt and urea in sweat) 4.Insulation of the body 5.Cutaneous sensation (from receptors in dermis) |
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Layers of skin
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Epidermis
Dermis Subcutaneous tissue |
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Characteristics of epidermis
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1. Contains no blood vessel
2. Most superficial layer |
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Layers of epidermis
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1. Stratum Corneum
2. Stratum Lucidum |
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This layer of epidermis is comprised of nonliving cells.
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Stratum Corneum
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Characteristics of Stratum Lucidum
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1. Comprised of living cells
2. Produces melanin |
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Composition of subcutaneous tissue
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Loose connective tissues
Fat tissues |
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Function of subcutaneous tissue
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1. Provides insulation, support, and cushion for skin
2. Stores energy for skin |
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Appendages of the skin
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1. Hair
2. Nails 3. Sebaceous glands 4. Sweat glands |
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2 types of hair
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1.Terminal hair
2. Vellus hair |
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Difference between terminal and vellus hair
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Terminal hair is course, thick, and pigmented. (scalp, eyebrow)
Vellus hair is shot and fine (chest, arms) |
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Parts of nail
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Lunula
Proximal nail fold/cuticle Lateral nail folds |
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These secret fatty substance through hair follicles
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Sabaceous gland
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Sabaceous gland can be found on all skin surfaces except ___________ & ___________.
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Palms & soles of feet
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Types of sweat glands
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Apocrine
Eccrine |
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Location of aprocrine glands
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Axillary and genital areas
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Difference between Eccrine and Apocrine glands
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Eccrine glands open on skin. Apocrine glands open into hair follicles.
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T or F: Apocrine glands are stimulated by emotional stress.
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True
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Causes of peripheral cyanosis
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1. Reduced blood flow to skin
2. Loss of oxygen to tissues |
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Causes of central cyanosis
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1. Reduced oxygen level in the blood
2. Advanced lung disease 3. Congenital heart disease 4. Abnormal hemoglobins |
