Term
| How much body weight is skin in dogs? |
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Definition
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Term
| How thick is skin in Dogs? |
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Definition
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Term
| How thick is skin in the cat? |
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Definition
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Term
| What are the main structures of the skin? |
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Definition
[image]
Epidermis
Adnexal Structures
Basement Membrane
Dermis
Subcutis |
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Term
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Definition
- outermost layer
- Basal epidermis cells continually divide, migrate outwards and are shed from the surface
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Term
| How thick is the epidermis usually? |
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Definition
3-4 cells deep,
but thicker over nose and footpads |
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Term
| What cell types exist in the epidermis? |
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Definition
keratinocytes
melanocytes
langerhan's cells |
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Term
| why are melanocytes important? |
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Definition
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Term
| Why are langerhan cells important? |
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Definition
| immunity and inflammation |
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Term
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Definition
[image]
thickest on nasal planum and footpads
thinnest on ventrum |
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Term
| The Different layers of keratinocytes |
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Definition
The stratum corneum: tough waterproof barrier of keratinised squames and intercellular sebum
Granular layer: keratin granules form and nuclei are lost
Spinous layer: calls begin to migrate
basal layer: actively dividing cells
basement membrane: adheres the basal layer to dermis |
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Term
| What happens when skin is insulted? |
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Definition
| increases proliferation, hyperkeratosis, lichenification and scaling. |
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Term
| What does Keratinisation defects result in? |
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Definition
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Term
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Definition
micromelanosomes: responsible for colour- depends on distribution in keratinocytes and hairs.
macromelanosomes: associated with damage to hair follicle and hair shaft . cause color dilution caused by clumping of melanin granules into macromelanosomes. |
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Term
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Definition
- connective tissue of collagen and elastin in a gel like proteoglycan matrix
- fibroblasts, dendritic cells, melanocytes, mast cells- increase with inflamm
- 3 layers of blood vessels, lymphatics, nerves
- hair follices and associated structures |
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Term
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Definition
no blood vessels in the epidermis
skin scrape deep enough to ooze blood.
1. deep blood vessels
2. mid hair follice
3. superficial |
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Term
| where are hair follices not found? |
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Definition
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Term
| Where are hair follicles more dense? |
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Definition
| more dense along the back and sparses on the underside of the body |
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Term
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Definition
by division of epidermal cells at the base of the follicle. |
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Term
| What governs hair growth? |
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Definition
| an invagination of the dermis rich in blood vessels and hormone receptors |
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Term
| What is the hair bulb and shaft made of? |
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Definition
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Term
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Definition
exogen: expulsion of hair
Anagen: growth
Catagen: involution
Telogen: resting
Most dogs and cats are predominantly telogen. ex. poodles are in anagen- vulnerable to chemo. |
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Term
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Definition
double layer of coarse primary (or guard) hairs and a dense undercoat of fine secondary hairs.
Dogs and cats tend to have compound hair follicles
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Term
| What are the two types of melanin? |
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Definition
| black/brown and yellow-red |
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Term
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Definition
secreted by sebaceous glands that secrete into hair follicles.
nutrients, prevents drying, ab, against infection
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Term
| Two types of sweat glands |
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Definition
Atrichial secrete onto the skin surface on the nose and footpads.
Epitrichial glands secrete into hair follicles. |
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Term
| skin on nose and footpads |
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Definition
| hairless, very thick, tightly attached to underlying tissues. |
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Term
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Definition
| specialised epidermis of the corium and nailbed- thick and highly keratinised stratum corneum with low lipid content |
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Term
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Definition
| Ear is continuous mucosecreteory with pharynx- eustachian tube |
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Term
| Common causes of skin disease for dogs and cats |
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Definition
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Dog
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Cat
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· Parasitic
· Infections : staph
Malassezia
Dermatophytes
· Allergic
· Endocrine
· Neoplasitc
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· Parasitic
· Infections:
Dermatophytosis
Staph
Malassezia
Viral
· Allergic
· Neoplastic
· Endocrine
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