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21 fall: histology > lab 10 skin > Flashcards

lab 10 skin Flashcards

1
Q

Epidermis is ___

A

keratinized stratified squamous epithelium.

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2
Q

4 layers of skin

A

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

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3
Q

“spines” of stratum spinosum are

A

intercellular bridges

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4
Q

what type of granules are found in stratum granulosum

A

keratohyalin granules

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5
Q

Two layers of dermis

A

The superficial layer is the papillary layer,

the deeper layer is the reticular layer

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6
Q

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

A

areolar connective tissue.

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7
Q

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

A

dermal papillae

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8
Q

what do papillae do?

A

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

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9
Q

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

A

dense irregular connective tissue.

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10
Q

DICT

A

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.

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11
Q

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

A

reticular layer of the dermis

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12
Q

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

A

areolar connective tissue and adipose tissue

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13
Q

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

A

subcutis (hypodermis) (suq Q)

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14
Q

Inner part of hair shaft ___

outer part of hair shaft ___

A

medulla

cortex

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15
Q

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

A

sinus hairs

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16
Q

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

A

vibrissa

annular sinus

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17
Q

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

A

Arrector Pili Muscle.

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18
Q

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.

A

uropygial or preen gland

feather follicles

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19
Q
A

avain skin

20
Q
A

sinus hair

21
Q
A

hair follicle

22
Q
A

compound hair follicle

23
Q
A

Planum Nasolabiale

  1. Epidermis
  2. Dermis
  3. Subcutis
  4. Dermal papilla
  5. Duct
  6. Nasolabial gland
24
Q
A

Planum Nasolabiale

The 4 layers of keratinocytes:

  1. Stratum basale
  2. Stratum spinosum
  3. Stratum granulosum
  4. Stratum corneum
25
Q
A
  1. Intercellular bridge of the stratum spinosum
26
Q
A

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
27
Q
A

Planum Nasolabiale

  1. Epidermis
  2. Dermis
  3. Subdermis
  4. Dermal papilla
  5. Duct
  6. Nasolabial gland
28
Q
A

Planum Nasolabiale

  1. Epidermis
  2. Papillary layer (dermal papilla) composed of loose connective tissue
  3. Reticular layer composed of dense irregular connective tissue
29
Q
A

Teat

  1. Epidermis
  2. Papillary layer of the Dermis
30
Q
A
  1. Epidermis
  2. Dermis
  3. Subcutis
  4. Dermal papilla
  5. Duct
  6. Nasolabial gland
31
Q
A

Equine Hair

  1. Epidermis
  2. Dermis
  3. Hair
  4. Hair bulb
  5. Hair follicle
  6. Sebaceous gland
  7. Sweat gland
32
Q
A

Equine Hair

  1. Arrector pili muscle
  2. Hair follicle
  3. Hair
33
Q
A
  1. Medulla, hair
  2. Cortex, hair
  3. Cuticle, hair
  4. Cuticle, inner root sheath
  5. Outer root sheath
  6. Connective tissue sheath
34
Q
A

–

  1. Elastic cartilage
  2. Hair follicle
  3. Epidermis, outer surface
  4. Epidermis, inner surface
35
Q
A

Canine ear

  1. Medulla, hair
  2. Cortex, hair
  3. Hair follicle
36
Q
A

Canine Ear

  1. Medulla, hair
  2. Cortex, hair
  3. Inner root sheath
  4. Outer root sheath
  5. Connective tissue sheath
37
Q
A

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
38
Q
A

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
39
Q
A

Equine Skin

  1. Sebaceous gland
  2. Sweat gland
  3. Hair
  4. Hair follicle
40
Q
A

Equine Skin

  1. Sebaceous gland
    * Note gland empties into hair follicle
  2. Empty hair follicle
41
Q
A

Equine skin

sweat gland

42
Q
A

Avian Skin

  1. Feather pulp
  2. Barbs, pigmented
  3. Feather follicle
  4. Dermis
  5. Epidermis
43
Q

layers of skin

A
44
Q
A

sinus hair

really big

45
Q

horse hair layers

A

21 fall: histology (36 decks)

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