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28 Cards in this Set
- Front
- Back
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What is the dermis of the hoof called?
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Corium
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ID these hoof regions
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A - Second phalanx
B - Flexor tendon C - Navicular bone D - Distal phalanx (coffin bone) E - Extensor tendon |
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ID these hoof structures
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A - Perioplic corium
B - Perioplic epidermis C - Coronary corium D - Coronary epidermis E - White line |
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ID these hoof regions
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A - Stratum tectorium (extension of perioplic epidermis)
B - Stratum medium (extension of coronary epidermis) C - Lamellar corium D - Lamellar epidermis |
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ID these hoof parts
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A - Sole corium
B - Frog C - Sole epidermis D - Bar E - Digital cushion |
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ID these hoof regions. which touch the ground?
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A - Heel
B - Bar C - Sole (doesn't touch ground) D - Frog |
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What are the regions of the hoof wall?
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Perioplic
Coronary Laminar |
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ID these hoof layers
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A - Perioplic epidermis
B - Perioplic corium C - Coronary corium D - Coronary epidermis E - Stratum tectorium |
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Which layer forms the bulk of the hoof wall? What kind of horn is this made of?
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Stratum medium (extension of coronary epidermis) is made of tubular and intertubular horn
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What layer(s) does the stratum medium lack?
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No stratum lucidum or stratum granulosum
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From whence does the tubular horn of the stratum medium arise?
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From germinal epithelium covering lateral and distal parts of the dermal papillae
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From whence does the intertubular horn of the stratum medium arise?
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From germinal epithelium in the depths of the epidermal pegs
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ID or FAIL!!!
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A - Stratum tectorium
B - Stratum medium C - Stratum internum D - Tubular horn E - Intertubular horn |
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Which is stronger - tubular or intertubular horn?
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Intertubular....totally
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What are the proximal and distal boundaries of the laminar epidermis?
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Extends from the deep edge of the coronary region to the sole
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What do the primary and secondary epidermal laminae interdigitate with?
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Primary and secondary laminar corium
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ID these. Which are dead.
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A - Laminar corium
B - Primary lamina (dead) C - Secondary laminae |
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What is the composition of the secondary laminae?
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Stratum germinitavum (basale?) of the epidermis
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T or F:
If the primary laminae are ripped-out, the hoof can still regrow. |
True! The germinal cells are not damaged in this case.
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Where does hoof growth primarily occur?
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Coronary band
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What is the rate of hoof growth?
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6mm/month
Takes 9-12mos for toe to grow out |
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What is the junction of the laminar and sole epidermis known as?
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White Line!
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What is the water content of the wall, sole, and frog?
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25%
33% 50% |
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What is the function of the frog?
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Shock absorber
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Which has longer papillae - the frog or the sole?
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Sole, brotha!
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What is the composition of the digital cushion? What is its function?
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Fibroelastic CT and Adipose tissue
Shock absorber |
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What is the difference between the claws/horns of equids vs. artiodactyl ungulates?
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Equids - primary and secondary laminae; single hoof contacts ground
Artiodactyls - only primary laminae; well developed heel bulbs (no frogs) |
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ID 1, 2, 3, 4, 7, 10, and 11
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1. Claw fold
2. Dermis 3. Digital pad 4. Distal phalanx 7. Limiting furrow 10. Sole 11. Wall |
