Hair
 Made of keratin (protein)
 Keratin also found in nails, claws, hooves, and
feathers
 Pelage = fur
1. Undercoat = insulation
2. Guard hairs = protection & color
 Hair is molted periodically (shedding)
 Vibrissae
1. Whiskers
2. F(x) = sensory hairs
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Horns
1. True horns
 Ruminants such as sheep, goats, cattle
 Hollow sheaths of epidermis around a bone
core stemming from the skull
 Not shed, not branched
 May be curved
 Found in both sexes
 Exception: polled breeds are hornless
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2. Antlers
 Deer family (Cervidae)
 All bone when mature
 Shed & re-grown annually beneath
vascularized soft skin (velvet)
 Become larger & more elaborate with age
3. Rhinoceros horns
 Hair-like horny fibers
 Arise from cells in skin
 Cemented together to form “horn”
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Teeth
 Four types
1. Incisors - biting
2. Canines - piercing
3. Premolars – shearing / slicing
4. Molars – grinding / crushing
 Tooth pattern used to identify species of
mammals
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