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33 Cards in this Set
- Front
- Back
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Functions of the skin
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Protect, thermoregulate, hydration, excretion, sensory, synthesis of vitamins D & other nutrients
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Types of integument
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Skin, glands, hoof, claw, horn, hair
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Layers of skin
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Epidermis, dermis, endodermis
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Layers of epidermis
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Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale
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What kind of cells are in the epidermis?
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Keratinocytes
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What separates the dermis and epidermis?
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Basement membrain
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Stratum basle
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Single row of keratinocytes
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Stratum granulosum
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2-4 layers of diamond shaped keratinocytes
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Stratum spinosum
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"Spiny layer" prickle sells, desmosomes, infrequent divisions
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Stratum lucidum
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"Clear layer" only in thick skin, made up of flattened dead cells
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Stratum corneum
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"Horny layer" outermost layer, composed of 20-30 layers dead skin
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Skin with hair has how many layers?
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3
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Dermis
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Greatest portion of skin
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Dermis is what?
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Elastic, vascularized, innervated
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How many layers in the dermis?
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2, papillary & reticular
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Hypodermis/endodermis
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Not part of skin, rich in blood&lymphatic vessels& nerves
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Plantigrade
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Whole foot on the ground
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Digitgrade
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Only the digits touch the ground
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Unguligrade
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Hooved
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Chestnuts & Ergots
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Dark horny structures on equines carpus and tarsus
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Hair function
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Maintain body temp, camouflage, protection
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Hair structure
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Follicle, bulb
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Hair layers
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Medula, cortex, cuticle
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Hair follicle layers
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Internal root sheeth, external root sheeth, connective root sheeth
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Types of hair
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Primary/guard, secondary, sinus/tactile
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Guard hairs
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Make up smooth outer coat
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Secondary hairs
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Undercoat
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Sinus/ tactile hairs
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Whiskers
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What effects hair color
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Melanin
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Arrector pili muscle
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Allows animals to puff up their hair
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Claws
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Hard pigmented outer covering of the digits
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Parts of the hoof
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Coronet, wall, heel, bar, peripole, sole, frog, bulb, white line
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Parts of horn
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Outer spiny layer, inner open layer
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