INTEGUMENTARY Flashcards
(114 cards)
Anagen phase
The active growth phase of a hair follicle.
Anal sac
A pair of small sacs located near the anus in many mammals that contain secretions used for scent marking.
Angle
Often refers to the angle of the hoof wall relative to the ground.
Apocrine sweat gland
A type of sweat gland found in skin and associated with hair follicles particularly in the axillae and groin which produces a viscous secretion.
Arrector pili muscle
A small muscle attached to hair follicles in mammals that contracts in response to cold or fear causing hair to stand on end.
Catagen phase
The transitional phase of a hair follicle between the active growth (anagen) and resting (telogen) phases.
Central sulcus
A groove or depression in the frog of the hoof.
Chestnut
A horny growth on the medial side of the leg of horses and related animals corresponding to a carpal pad or tarsal pad.
Claw
A sharp curved keratinized projection at the end of a digit in many mammals birds and reptiles used for grasping climbing or defense.
Coffin bone
The common name for the distal phalanx bone in the foot of a horse.
Collateral sulcus
Grooves on either side of the frog in the hoof.
Compound follicle
A hair follicle that contains more than one hair shaft.
Corium
The connective tissue layer underlying the epidermis in skin and associated structures providing support and nourishment also called the dermis in skin.
Coronary band
The area where the skin meets the hoof wall in horses.
Coronary corium
The connective tissue layer beneath the coronary band of the hoof that produces the hoof wall.
Cortex
The middle layer of a hair shaft composed of keratinized cells containing pigment.
Cuticle
The outermost layer of a hair shaft or nail composed of overlapping keratin scales or a thin layer of epidermis at the base of a nail or hoof.
Defecation
The elimination of feces from the body.
Dermal papillae
Finger-like projections of the dermis into the epidermis containing capillaries and nerves that nourish the epidermis and hair follicles.
Dermis
The layer of skin below the epidermis composed of connective tissue nerves and blood vessels also called corium.
Stratum corneum horny layer
This is the outermost layer and dominates the epidermis
These are remnants of keratinocytes sometimes called horny or cornified cells but commonly called dandruff.
Stratum granulosum, the granular layer
This is the middle layer, composed of two to four layers of flattened keratinocytes
Stratum lucidum, the clear layer
This layer is found only in very thick skin It appears as a translucent layer composed of a few rows of flattened dead cells
Stratum spinosum prickle-cell layer
This layer contains several layers of cells held together by desmosomes