Ch.6 Integumentary System

Question 1

One of the largest and most extensive organs in the body

Answer 1

The Integument

Question 2

Waterproof shield composed of keratinized stratified squamous epithelium

Answer 2

Epidermis

Question 3

Underlying tough layer made of connective tissue

Answer 3

Dermis (Corium)

Question 4

Third layer found below the dermis, primarily adipose tissue

Answer 4

Hypodermis (Subcutaneous)

Question 5

Produce keratin to provide skin resiliency and strength

Answer 5

Keratinocyte

Question 6

Melanin pigment production to protect keratinocytes from UV rays

Answer 6

Melanocyte

Question 7

Found at the epidermal-dermal junction

Answer 7

Merkel Cell

Question 8

Horny, outermost layer that makes up 1/2 total epidermis thickness

Answer 8

Stratum Corneum

Question 9

Clear Layer, only found in thick skin

Answer 9

Stratum Lucidum

Question 10

Middle later of skin composed of 2-4 layers of flattened keratinocytes

Answer 10

Stratum Granulosum

Question 11

Several layers of cells held together by desmosomes, Spiny Layer

Answer 11

Stratum Spinosum

Question 12

Deepest layer that consists of a single row of keratinocytes, basal layer

Answer 12

Stratum Germinativum

Question 13

Stratum Corneum
Stratum Spinosum
Stratum Basale

Answer 13

The 3 Epidermal layers

Question 14

Greatest portion of integument = the “Hide”

Answer 14

Dermis

Question 15

The 2 Dermis layers

Answer 15

1.Papillary and 2.Reticular Layer

Question 16

Thin, Superficial layer that lies just below the epidermis

Answer 16

Papillary Layer

Question 17

80% of the dermis

Answer 17

Reticular Layer

Question 18

Tough, thick layers of fat and connective tissue

Answer 18

Paw Pads

Question 19

Top of nose in cats, pigs, sheep, and dogs

Answer 19

Planum Nasale

Question 20

Dark, Horny structures on legs of equine family

Answer 20

Ergots and Chestnuts

Question 21

Maintains body temperature by trapping insulating layers of air

Answer 21

Hair

Question 22

Part of hair visible above skin

Answer 22

Hair Shaft

Question 23

Anchors Hair

Answer 23

Follicle

Question 24

Up to 15 hairs may be associated with one

Answer 24

Pore

Question 25

Small, smooth muscle attached to every hair follicle

Answer 25

Arrector Pili

Question 26

Oil Glands are

Answer 26

Sebaceous Glands

Question 27

Part of hair buried below skin

Answer 27

Hair Root

Question 28

Rapidly dividing epithelial cells that cover the papilla

Answer 28

Matrix

Question 29

Mound of dermal cells at base of bulb

Answer 29

Papilla

Question 30

Web of sensory endings that envelops the root

Answer 30

Root hair plexus

Question 31

Innermost central core

Answer 31

Medulla

Question 32

Surrounds medulla

Answer 32

Cortex

Question 33

Single cell layer hair surface composed of keratin

Answer 33

Cuticle

Question 34

Yellowish and reddish colors in dogs

Answer 34

Pheomelanin

Question 35

Brown-black colors in dogs

Answer 35

Tyrosine Melanin

Question 36

Reservoir for malodorous secretions

Answer 36

Anal Sacs

Question 37

Hard outer coverings of distal digits, no retractable except in most cats

Answer 37

Claws

Question 38

Evoluntionary remnants of digits

Answer 38

Dewclaws

Question 39

Horny outer covering of digits of some animals

Answer 39

Hoof = Ungula

Question 40

Mass of horny keratin

Answer 40

Horns