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Skin layers, Hoof wall layers - Coggle Diagram
Skin layers
Dermis
Sebaceous gland - lipid rich sebum, holocrine
Sweat glands
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Atrichial = Directly onto skin surface. Eccrine
Paw pads, ungulated, carpus in pigs, nasolabial in pigs and ruminants
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Nerves
- Root hair plexus
- Pascinian corpuscle
- Meissner's corpuscle
- Merkel's discs
- Ruffini corpuscle
- Krause's corpuscle
Hair follicle
Compound = one ostium, several hair
Simple = one ostium, one hair
Epidermis
Moving escalator of Epidermis
- Stratum corneum
- Stratum lucidim
- Stratum granulosum
- Stratum spinosum
- Stratum basale
Remember -
Desmosomes = cellular attachments between keratinocytes
Hemidesmosomes = anchor basal cells to basement membrane
Keratinocytes
Originate in stratum basale and move upwards.
Produce keratins = structural, fibrous proteins, insoluble and resistant to most enzymes.
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Melanocytes
Dendritic cells in close contact with keratinocytes, derived from Neural Crest cells. Produce melanin (eumelanin + phaemelanin) in melanosomes
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Hypodermis / Panniculus / Subcutis
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