Integumentary System Flashcards
Acts as a barrier to protect body from the outside world.
Integumentary system
Other name for skin
Cutis
The skin is composed of ___ % of BW
16%
This is the most superficial layer of the skin, nonvascular, thickest region of this occurs on the nasal skin and digital pads.
Epidermis
Lies under the epidermis, richly supplied with vessles, nerves and glands. Fiber types: Collagen, elastic, reticular
Critical role in temperature regulation.
Dermis
Also called the subcutis, subcutaneous tissue, or superficial fascia which consists of
loose connective tissue. It is also where fat cells develop.
Hypodermis
How many layers does the epidermis has?
5 layers
the layer of cells adjacent to the upper portion of the dermis
Stratum basale
prickle-cell layer next to stratum basale, diamond-shaped;
flattened polygonal cells
stratum spinosum
granular layer
stratum granulosum
clear layer
stratum lucidum
horny layer
stratum corneum
A band of smooth muscle attached surrounding tissue sheath of the hair follicle. Well developed in the dorsal region of the neck, back, tail. Responsible for erection of hair.
Arrector pili muscle
Examples of this muscle are sphincter colli superficalis, platysma and spinchter colli profundus. When contracted tend to move the skin and it’s associated structures.
Cutaneous muscles
These are the glands of canine skin
- Sweat glands
- Sebaceous glands
- Glands of ear canal
- Circumanal glands
- Glands of the anal sac
Sweat glands are composed of __________
Eccrine and apocrine
found only in the foot pads. It has watery secretion.
Eccrine
found mainly in association with hair follicle
apocrine
This gland has oily secretion in association with hair follicle. Special ones are found in the eyelids, the meibomian or tarsal glands.
Sebaceous glands
secretes a brown waxy material called cerumen
Glands of ear canal
these glands are numerous in the vicinity of the anal orifice
circumanal glands
are pairs sacs that lie in the 4 and 8 o’clock
glands of the anal sac
Arterial supply of the skin
cutaneous arteries.
are slender keratinous filaments that cover almost all parts of the body
Hairs
Part of the hair which portion is above the surface of the skin
Shaft (scapus pili)
the embedded portion in a tubular invagination of the epidermis
called the hair follicle which extends down to the dermis
root (radix pili)
is a modification of the epidermis as horny covering of the distal end of the third phalanges of the digits.
Claws (Unguicula)
heavily pigmented and is the toughest region of the canine skin. The rough surface is due to the presence of heavily keratinized conical papillae. Sweat glands are found here
Digital Pads
Arterial supply of Mammary glands
sternal branches of the internal thoracic arteries
