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16 Cards in this Set
- Front
- Back
Components of Integumentary System
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Skin
Blood Vessels Nerves Glands Sensory Organs Hair Nails |
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Skin Functions
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Prevents dehydration
Prevents infection Regulates body temperature Provides sensory information Absorbs substances Manufactures Vitamin D Excretion |
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Structures of the Skin
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Epidermis
Dermis Subcutaneous Accessory Structures |
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Accessory Structures of the Skin
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Sebaceous Glands
Meibomian Glands Sudoriferous (sweat) Glands Hair Nails |
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Epidermis Characteristics
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Outermost Portion
Epithelial Cells No blood vessels Nourished by capillaries in the dermis |
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Layers of the Epidermis
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Stratum Basale
Stratum Corneum Stratum Lucidum |
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Stratum Basale Definition
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Skin layer closest to the dermis
Produces new epidermal cells |
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Stratum Corneum Definition
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Outer layer of the epidermis
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Stratum Lucidum Definition
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Found in thick skin
Layer that resists abrasion |
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Dermis Characteristics
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Considered the "true skin"
Below the epidermis Ability to stretch extensively Contains blood vessels and nerves Accessory structures found in this layer |
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Subcutaneous Layer Characteristics
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Below the dermis
Connects skin to the superficial muscles Composed of: Adipose tissue Loose Connective Tissue Blood Vessels Nerves Nerve endings |
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Sebaceous Gland Characteristics
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Oil glands
Open to hair follicles Used for lubrication of skin/hair (prevents dryness) |
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Sudoriferous Gland Characteristics
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Sweat glands
Two Types: Eccrine, Apocrine Modified Sweat Glands: Mammary Glands, Ceruminous Glands, Ciliary Glands |
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Hair Characteristics
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Hair Follicle
Not living (mostly keratin) Melanocytes-pigments that color hair Hair Root-portion of hair below the skin Erector Pili-thin band of involuntary muscle |
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Characteristics of Nails
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Hard Keratin produced in stratum corneum
Nail Root-proximal end of the nail Nail Matrix-nail growth region Lunala-proximal nail over thickest portion of growth region Cuticle-seals space between the skin and nail plate |
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Determinants of Skin Color
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Pigmentation (melanin production)
Quality of circulating blood Substances in the blood |