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Ch. 10 Skin Deep

Veterinary Medical Terminology

TermDefinition
Integumentary System the skin and it's appendages
Epithelial Tissue (Epithelium) what the skin is composed of
Cutane/o, Derm/o, Dermat/o, -derma meaning "skin"
Dermatology the study of skin
Epidermis outer layer of skin, several layers thick and no blood vessels
epi- meaning "above"
-dermis meaning "skin"
Squamous Epithelium composed of flat, platelike cells
Keratin protein that provides skin with it's waterproofing properties
Kerat/o Meaning "horny, cornea, and keratin"
Melanocytes cells that produce and contain a black pigment
Melanin black pigment found in cells
melan/o meaning "melanin, or black, or dark"
Albinism the absence of normal pigmentation
Dermis (Corium) layer of skin directly deep to the epidermis
Stratum Basale (Stratum Germinativum) deepest or basal layer that continually multiples to replenish cells lost from the epidermal surface
Cuboidal cube-like cells arranged in rows
Stratum Spinosum (Prickle, Spinous layer) Layer immediately superficial to the stratum basale which is the thickest in hairless regions and in areas of high wear and tear
Keratinization the development of the hard protein constituents of hair, nails, epidermis, horny structures, and tooth enamel
Desquamation the process in which cell organelles gradually dissolve
Stratum Granulosum layer immediately superficial to the Stratum Spinosum, cells contain keratin granules in there cytoplasm
Stratum Lucidum layer immediately superficial to the Stratum Granulosum, clear layer because of the accumulation of keratin fibers in cell cytoplasm
Statum Corneum (horny layer) the most superficial layer of the epidermis which, consists of layers of dead, highly keratinized and flattened cells
Fibroblasts fiber producing cells, ex Collagen
Perception the ability to recognize sensory stimuli
Tactile Perception the ability to recognize touch sensation
Collagen tough, flexible, fibrous protein found in skin, bone, cartilage, tendons, and ligaments
-gen meaning to produce)
Histiocytes (macrophages) phagocytes cells that engulf foreign substances
Mast cells cells that respond to insult by producing and releasing histamine and heprin
histamine a chemical released in response to allergens that cause itching
Heprine an anticoagulant chemical released in response to a patient
Subcutaneous layer (Hypodermis) located deep to or under the dermis and is composed of connective tissue
Fat (lipid) adipocytes - fat cells that produce lipids
Adip/o meaning "fat"
Sebaceous glands (oil glands) secrete and oily substance called sebum
seb/o meaning "sebum, or oily substance"
Ducts tubelike passages
Ductules tiny ducts
Holocrine glands secreting cells and their secretions make up the discharge produced
Sweat (Sudoriferous) glands aggregations of cells located in the dermis.
Eccrine sweat glands produce and secret water, salt, and waste (sweat) and are located in various regions depending on the species
Apocrine sweat glands secrete a strong smelling substance onto the hair follicles
Hyperthermia high body temperature
Hypothermia low body temperature
Hidrosis the production and excretion of sweat
Hidr/o meaning "sweat"
Anhidrosis the abnormal reduction of sweat
Hyperhidrosis excessive sweating
Ceruminous glands modified sweat glands that are located in the ear canal
Cerumen (earwax) a waxy substance of varying colors depending on the species
Hair rodlike fibers or dead protein cells filled with keratin
Pil/i, Pil/o, Trich/o meaning "hair"
cuticle one cell layer thick, scaly, outer layer of hair
Cortex the main component of hair several layers thick, responsible for coat color
Medulla the innermost layer of the hair
Root the portion of hair that is below the skin surface and surrounded by a hair follicle
Follicles tubes that hold the hair fibers
Arrector Pili a tiny muscle attached to the hair follicle that causes the hair to stand on end
Piloerection condition of the air standing straight up
Fur short, fine hair
Pelt skin in addition to fur
Guard hairs (Primary hairs, topcoat) long, straight, stiff hairs that form the outer coat, include tail and mane hair, bristly hair of swine, and most fur hair
Secondary hairs (undercoat) finer, softer, wavy hair. includes wool, wavy hair near the skin of rabbits
Tactile Hair (Vibrissae) long ,brittle, extremely sensitive hairs that usually located on the face (ex. cat whiskers)
Cilia thin, short hairs, ex. eyelashes
Simple pattern hair growth guard hairs that grow from separate follicular openings
Compound Patter hair growth Multiple guard hairs that grow from a single follicle, as in dogs
Shedding normal hair loss
Walls usually located dorsal and lateral to the distal phalanx
Sole located ventral to the distal phalanx and usually flaky
Foot pads (Tori) provide cushioning and protection for bones of the foot
Digital pads dogs and cats have them, on the palmar and plantar surfaces of the phalanges
Metacarpel/Metatarsal singular pads located on the palmar and plantar surfaces
Carpal pads located on the palmar surface of each carpus
Digitigrade dogs and cats, because they walk on their toes, with only the digital and metacarpal, and metatarsal
Plantigrade animals with well developed foot pads, walk with phalanges, metacarpel, and metatarals
-grade meaning "GO!"
Nails and claws keratin plates covering
Created by: dmweaver