lab 10 skin

Question 1

Epidermis is ___

Answer 1

keratinized stratified squamous epithelium.

Question 2

4 layers of skin

Answer 2

stratum basale (stratum germinativum)
stratum spinosum
stratum granulosum
stratum corneum.

Question 3

“spines” of stratum spinosum are

Answer 3

intercellular bridges

Question 4

what type of granules are found in stratum granulosum

Answer 4

keratohyalin granules

Question 5

Two layers of dermis

Answer 5

The superficial layer is the papillary layer,

the deeper layer is the reticular layer

Question 6

The papillary layer of the dermis is thin and composed of ____

Answer 6

areolar connective tissue.

Question 7

the finger-like projections of the dermis which interdigitate with the overlying epidermal ridges

Answer 7

dermal papillae

Question 8

what do papillae do?

Answer 8

These papillae are important in anchoring the epidermis to the dermis.

Question 9

reticular layer is the thicker, deeper layer of the dermis. It is composed of ___

Answer 9

dense irregular connective tissue.

Question 10

DICT

Answer 10

more collagen fibers in the ECM (larger, coarser, and often bundled) when compared to the amount of collagen seen in the arealor connective tissue of the papillary layer.

Dense connective tissue also tends to contain fewer cells.

Question 11

Sweat glands, hair follicles, and sebaceous glands are found in the ___

Answer 11

reticular layer of the dermis

Question 12

The hypodermis is composed mainly of ___ and ___ which gives the skin flexibility and free movement over the underlying structures.

Answer 12

areolar connective tissue and adipose tissue

Question 13

Large fat deposits in the ___ are characteristic of the fat pads and digital cushions where they serve as shock absorbers

Answer 13

subcutis (hypodermis) (suq Q)

Question 14

Inner part of hair shaft ___

outer part of hair shaft ___

Answer 14

medulla

cortex

Question 15

The dermal (connective tissue) sheath is also not well portrayed except around ____

Answer 15

sinus hairs

Question 16

Sinus hairs (e.g. whiskers, or ___) are highly specialized for tactile sense. In this structure a blood-filled _____ separates the inner and outer layers of the thickened dermal sheath

Answer 16

vibrissa

annular sinus

Question 17

The contraction of these smooth muscles promotes the erection of the hair shaft into a more vertical position.

Answer 17

Arrector Pili Muscle.

Question 18

Avian skin lacks glands. The ____ at the base of the tail provides oil in the absence of sebaceous glands in the skin. In addition, _____ rather than hair follicles are present.

Answer 18

uropygial or preen gland

feather follicles

Question 19

Answer 19

avain skin

Question 20

Answer 20

sinus hair

Question 21

Answer 21

hair follicle

Question 22

Answer 22

compound hair follicle

Question 23

Answer 23

Planum Nasolabiale

1. Epidermis
2. Dermis
3. Subcutis
4. Dermal papilla
5. Duct
6. Nasolabial gland

Question 24

Answer 24

Planum Nasolabiale

The 4 layers of keratinocytes:

1. Stratum basale
2. Stratum spinosum
3. Stratum granulosum
4. Stratum corneum

Question 25

Answer 25

1. Intercellular bridge of the stratum spinosum

Question 26

Answer 26

Teat 1. Epidermis 1a. Stratum basale * Melanin granules stained orange 1b. Stratum spinosum 1c. Stratum granulosum * Keratohyalin granules stained blue/purple 1d. Stratum corneum 2. Dermis

Question 27

Answer 27

Planum Nasolabiale 1. Epidermis 2. Dermis 3. Subdermis 4. Dermal papilla 5. Duct 6. Nasolabial gland

Question 28

Answer 28

Planum Nasolabiale 1. Epidermis 2. Papillary layer (dermal papilla) composed of loose connective tissue 3. Reticular layer composed of dense irregular connective tissue

Question 29

Answer 29

Teat 1. Epidermis 2. Papillary layer of the Dermis

Question 30

Answer 30

1. Epidermis 2. Dermis 3. Subcutis 4. Dermal papilla 5. Duct 6. Nasolabial gland

Question 31

Answer 31

Equine Hair 1. Epidermis 2. Dermis 3. Hair 4. Hair bulb 5. Hair follicle 6. Sebaceous gland 7. Sweat gland

Question 32

Answer 32

Equine Hair 1. Arrector pili muscle 2. Hair follicle 3. Hair

Question 33

Answer 33

1. Medulla, hair 2. Cortex, hair 3. Cuticle, hair 4. Cuticle, inner root sheath 5. Outer root sheath 6. Connective tissue sheath

Question 34

Answer 34

– 1. Elastic cartilage 2. Hair follicle 3. Epidermis, outer surface 4. Epidermis, inner surface

Question 35

Answer 35

Canine ear 1. Medulla, hair 2. Cortex, hair 3. Hair follicle

Question 36

Answer 36

Canine Ear 1. Medulla, hair 2. Cortex, hair 3. Inner root sheath 4. Outer root sheath 5. Connective tissue sheath

Question 37

Answer 37

Canine Lip 1. Hair 2. Inner root sheath 3. Outer root sheath 4. Connective tissue sheath, inner 5. Connective tissue sheath, outer 6. Sinus pad 7. Sebaceous glands 8. Erythrocytes 9. Epidermis

Question 38

Answer 38

Canine Lip 1. Hair 2. Inner root sheath 3. Outer root sheath 4. Connective tissue sheath, inner 5. Sinus pad 6. Erythrocytes 7. Annular sinus 8. Connective tissue sheath, outer

Question 39

Answer 39

Equine Skin 1. Sebaceous gland 2. Sweat gland 3. Hair 4. Hair follicle

Question 40

Answer 40

Equine Skin 1. Sebaceous gland * Note gland empties into hair follicle 2. Empty hair follicle

Question 41

Answer 41

Equine skin | sweat gland

Question 42

Answer 42

Avian Skin 1. Feather pulp 2. Barbs, pigmented 3. Feather follicle 4. Dermis 5. Epidermis

Question 43

layers of skin

Answer 43

Question 44

Answer 44

sinus hair really big

Question 45

horse hair layers

Answer 45