Chapter 10 (Skin) part 1 Flashcards Preview

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Flashcards in Chapter 10 (Skin) part 1 Deck (129):
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What is the skin composed of?

Epithelial tissue

1

Cutane/o, derm/o, dermat/o

Skin

2

Dermatology

Study of the skin

3

Epidermis

Outermost layer of the skin

4

Epi-

Above

5

Dermis

Skin

6

Squamous epithelium

Composed of flat, plate like cells

7

Keratin

Protein that provides skin with its waterproofing properties

8

Melanocytes

Produce and contain a black pigment
Found in the basal layer

9

Melanin

Black pigment

10

Melan/o

Black or dark

11

Albinism

Absence of normal pigmentation

12

Dermis

Layer directly deep to the epidermis
Also called the corium

13

Stratum basale or stratum germinativum

Deepest or basal layer that continually multiplies to replenish cells lost from the epidermal surface

14

Cuboidal

Cube like cells arranged in rows

15

Stratum spinosum

Layer immediately superficial to the stratum basale

16

Keratinization

Development if the hard, protein constituent of hair, nails, epidermis, horny structures, and tooth enamel.

17

Desquamation

The process in which cell organelles gradually dissolve

18

What is the stratum granulosum?

Layer immediately superficial to the stratum spinosum

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What is the stratum lucidum?

Layer immediately superficial to the stratum granulosum

20

What is stratum corneum?

Most superficial layer of the epidermis
Aka horny layer

21

Fibroblasts

Fiber producing cells

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Collagen

Tough, flexible, fibrous protein found in skin,bone, cartilage, tendons, and ligaments

23

-gen

Produce

24

Histiocytes

Phagocytic cells that engulf foreign substances

25

Macrophages

Foreign substances

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Mast cells

Cells that respond to insult by producing and releasing histamine and heparin

27

Histamine

Chemical released in response to allergens that causes itching

28

Heparin

Anticoagulant chemical released in response to injury

29

Perception

Ability to recognize sensory stimuli

30

How is perception received?

Nerve impulses that recognize temperature, touch, pain, and pressure

31

Tactile perception

Ability to recognize tough sensation

32

Subcutaneous layer or hypodermis

Under the dermis, composed of connective tissue
Contains a large amount of fat

33

Sebaceous glands or oil glands

Secrete sebum

34

Sebum

Oily substance

35

Seb/o

Sebum or oily substance

36

Ducts

Glands that release debum

37

Ductules

Tiny ducts

38

Sudoriferous or sweat glands

Located on dermis

39

Eccrine glands

Produce water, salt, and waste (sweat)

40

Apocrine glands

Produce and secrete a strong smelling substance into the hair follicles

41

Hyperthermia

High body temperature

42

Hypothermia

Low body temperature

43

Hidrosis

Production and excretion of swear

44

Hidr/o

Sweat

45

Anhidrosis

Abnormal reduction of sweating

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Hyperhidrosis

Excessive sweating

47

Ceruminius

Glands are modified swear glands that are located near ear canal

48

Cerumen

Waxy substance of varying colors depending on species
(Earwax)

49

Pil/i, pil/o, trich/o

Hair

50

Cuticle

One cell layer thick and appears scaly

51

Cortex

Main component if hair shaft, responsible for coat color

52

Medulla

Innermost component of hair shaft

53

Follicles

Sacs that hold hair fibers

54

Arrector pili

Tiny muscle attached to the hair follicle that causes hair to stand erect to cold or stress

55

Piloerection

Condition if hair standing straight up

56

Walls

Located dorsal and lateral to distal phalanx

57

Sole

Located central to distal phalanx and usually flaky

58

Foot pads or tori

Provide cushioning and protection do bones of the foot

59

Metacarpal and metatarsal pads

Singular pads located on the palmar and plantar surfaces of metacarpal and metatarsal areas

60

Difitigrade

Animals that walk on their toes

61

Plantigrade

Well developed foot pads (ex. Primates)

62

Nails and claws

Keratin plates covering the dorsal surface of the distal phalanx

63

Fur

Short, fine, soft hair

64

Pelt

Skin in addition to due or hair

65

Guard hairs

Long, straight, stuff hairs that form the outer coat
Aka primary hairs or topcoats
Found on tail, mane hair

66

Secondary hair

Finer, softer and wavy hair
Aka undercoat

67

Tactile hair

Long, brittle, extremely sensitive hairs usually located on the face
Aka vibrissae
Ex. Cat whiskers

68

Cilia

Thin, short hairs
Ex. Eyelashes

69

Simple pattern hair growth

Guard hairs that grow from separate follicular openings
As in cattle

70

Compound pattern hair growth

Multiple guard hairs that grow from single follicles
As in dogs

71

Shedding

Normal hair loss caused by temperature, hormones, photoperiod, nutrition, and other no disease causes

72

Fungi

Vegetative organisms (plants) that grow as branched, hairlike filaments

73

Phyt/o

Plant

74

Quick

Beneath wall and sole of claws is connective tissue dermis that contains numerous blood vessels and nerve endings

75

Quicking

Describes trimming the nail or claw to the level of the dermis
Results in bleeding and pain

76

Onych/o

Claw

77

Hooves

Horny covering of the distal phalanx in ungulates

78

Ungulates

Hooves animals

79

Ungul/o

Hoof

80

Corium

Dermis of the hoof and is located under the epidermal surface of the hoof wall, sole, and frog

81

Dewclaws

Rudimentary bones

82

Chestnuts

Located on the medial surface of the leg

83

Coronary band

Region where hoof meets the skin

84

Coronet

Site of hoof wall growth

85

Periople

Flaky tissue band located at the junction of the coronary band and the hoof wall extends distally

86

Wall

Epidermal tissue that includes the toe (front), quarters (sides), and heels (back)

87

Bars

Raised V shaped structure on ventral surface of hoof

88

Sole

Softer hoof tissue located on the ventral surface of the hoof (bottom of the hoof)

89

Frog

V shaped pad of soft horn located in the central region of the ventral hoof surface of equine

90

Bulbs of heel

Upward thickening of the frog above heels of the wall

91

Horns

Permanent structures that grow continuously after birth

92

Cornifucation

Conversion of epithelium into keratin or horn

93

Polled

Breeds that are naturally hornless

94

Antlers

Not permanent structure and are shed and regrown annually

95

Biopsy

Removal of living tissue for examination of life

96

Bi/o

Life

97

-opsy

View of

98

Incisional biopsy

Removal of a piece of a tumor or lesion for examination

99

Incision

A cut into tissue

100

Excisional biopsy

Removal of an entire tumor or lesion in addition to a margin of surrounding tissue for examination

101

Excision

A cut out of tissue

102

Culture

Diagnostic or research procedure used to allow microbes to reproduce in predetermined media

103

Tissue culture

Takes epithelial cells and grows them in a medium so that intracellular microbes such as viruses can replicate

104

Exfoliative cytology

Scraping of cells from tissue and examination under a microscope

105

Exfoliative

Falling off

106

Intradermal skin testing

Injection of test substances into the skin layer to observe a reaction

107

Skin scrape

Microscopic examination of skin for the presence of mites

108

Abrasion

Injury in which superficial layers of skin are scraped

109

Abscess

Localized collection of pus

110

Acne

Skin inflammation caused by plugged sebaceous glands and comedone development from papules and pustules

111

Acute moist dermatitis

Bacterial skin disease that is worsened by licking and scratching
Also called hot spot

112

Alopecia

Hair loss resulting in hairless patches or complete lack of hair

113

Atopy

Hypersensitivity reaction in animals involving pruritis with secondary dermatitis
Aka allergies or allergic dermatitis

114

Hypersensitization

Increased response to an allergen

115

Hyposensitization

Decreased response to an allergen

116

Bullae

Multiple contained skin elevations filled with fluid that are greater than 0.5 cm in diameter

Singular form is bulla

117

Burn

Tissue injury causes by heat, flame, electricity, chemicals, or radiation

118

Carbuncle

Cluster of furnucles

119

Carcinoma

Malignant neoplasm of epithelial tissue

120

Cellulitis

Inflammation of connective tissue

121

Diffuse

Widespread

122

Localized

Within a well defined area

123

Comedo

Blackhead or buildup of sebum and keratin in a pore

Plural is comedones

124

Contusion

Injury that does not break the skin
Characterized by pain, swelling, and discoloration

125

Crust

Collection of dried sebum and cell debris

126

Dermatitis

Inflammation of the skin

127

Contact dermatitis

Inflammation of the skin caused by touching an irritant

128

Dermatocellulitis

Inflammation of the skin and connective tissue