Skin, Hair and Associated Glands Flashcards
Functions Of Skin?
Protection
Immunity
Sensory
Secretion
Production
Storage
Thermoregulation
Communication
pH of dog and cats skin
Canine pH- 7.4
feline pH- 6.4
Vitamin D helps to absorb what mineral? and in what organ?
Calcium Ca+
absorbed in the instestines
Structure Of Skin
Made up of what 3 layers
- Epidermis
- Dermis
- Hypodermis/subcutaneous
Thickness of skin in a dog
- Dogs 0.5 – 5 mm
Thickness of skin in a cat
- Cats 0.4 – 2 mm
Is the Epidermis avascular?
Yes
What type of tissue is the epidermis layer?
Stratified squamous epithelial tissue
How many cells thick is the stratified squamous epithelial tissue in the epidermis?
- 4-5 cells thick
Layers of the epidermis?
From least superficial
- Stratum basale/germinativum layer.
-Stratum spinosum
-Stratum granulosum - Stratum lucidum
- Stratum corneum
How long does it take for cells to migrate from stratum Basale > stratum granulosum
Approx 22 days
Dermis contains?
- Blood vessels
- Lymph vessels
- Nerves
- Glands
- Hair follicles
Dermis tissue type?
Dense connective tissue
What is the tissue is the Hypodermis/Subcuticular Layer of skin?
Loose connective tissue
Fat cells
Elastic fibres
The mechanoreceptors ‘Pacinian Corpuscles’ found in the skin detects?
pressure and vibration.
The mechanoreceptors ‘Ruffini Corpuscles’ found in the skin has what function?
velocity of skin movement/touch
Merkel cells?
Sense steady pressure and tactile stimuli
skin stretch
High threshold mechanoreceptors
respond to painful stimuli
Type of tissue footpads are made up of?
Stratum corneum is thickened,
heavily keratinised
Coronary
border
List the different Sebaceous glands
- Tail glands
- Circumanal
- Anal sac
- Circumoral
- Ceruminous
- Meibomian
Whats an example of a Sudoriferous gland
mammary gland
what does Alveolar glands
secrete.
Secrete a waxy/oily Sebum
* Antiseptic properties
* Contains pheromones
Where are Supracaudal Glands found
Dorsal aspect of tail
Anal Sac Glands location
8 and 4 O’clock
Perioral Glands location
Lips of cats
What does Ceruminous Glands secrete
Ear wax
what are Meibomian / Tarsal Glands?
Open at mucocutaneous
junction of eyelids
Secrete tears.
What are Sudoriferous Glands
Sweat glands
* found in foot pads & nose *
what shape are Sudoriferous Glands
Coiled
What type of gland is the mammary glands
Highly modified
sudoriferous/sweat gland
How many pairs of mammary glands does a cat have
4 pairs
How many pairs of mammary glands does a dog have
5 pairs
3 types of hairs
Guard / primary
Wool / secondary
Vibrissae / tactile
What are Lanugo hairs
Wool hairs
Where are Vibrissae / Tactile Hairs found?
Upper lip
eyelashes
Eyebrows
Cheeks and chin
Carpus of the cat