THE INTEGUMENTARY SYSTEM

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1

What are the 3 major regions of the Skin?

EDH

Epidermis, Dermis, Hypodermis

2

Superficial Region

What is Epidermis?

3

Middle Region

What is Dermis?

4

Deepest Region

What is Hypodermis?

5

Layer to deep skin; Mostly adipose tissue

What is Subcutaneous?

6

This region of skins tissue is Keratinized stratified squamous epithelium

What is Epidermis?

7

What skin region contains the following cells..

  • - keratinocytes
  • - basal cells – stem cells
  • - melanocytes - pigment
  • - Langerhan’s - macrophages (immune system)
  • - Merkel cells (tactile receptors)

What is epidermis?

8

The epidermis consists of ______________ epithelium.

Keratinized stratified squamous epithelium

9

What is the name of the area hair growth occurs?

What is the hair bulb

10

Hair is made of of a tough protein called _______

What is Keratin?

11

A hair _____ anchors each hair into the skin.

Follicle

12

Sensory nerve endings around each hair bulb

What is

Hair follicle receptor (root hair plexus)

13

The hair ____ forms the base of the hair follicle, living cells divide and grow to build the hair shaft

What is the hair bulb?

14

The sweat glands that produce a watery substance and are associated with exercise and stress are the _________ sweat glands, while glands that produce an organic substance that causes body odor are the __________ sweat glands.

eccrine, apocrine

15

What DERMAL layer is closest to the epidermis?

papillary layer

16

This layer is found only in thick skin.

What is stratum lucidum?

17

Which vitamin begins its synthesis in the skin exposed to ultraviolet light?

vitamin D

18

are responsible for the reduction of water loss from the skin.

What are Keratinocytes?

19

If you accidentally cut your arm and see connective tissue and fat, which layer(s) was/were cut?

hypodermis
stratum corneum
dermis
stratum basale

Basically all layers

20

-the amount of collagen in the dermis decreases.

-the subcutaneous tissue loses adipose tissue.

-the epidermis thins.

changes a persons skin undergoes as they age

21

Intact skin provides protection because

it forms a physical barrier against the entry of microbes.

22

produces a layer of cells that resist abrasion.

What is Keratinization?

23

Fingerprints and footprints are produced by projections into the epidermis called…

What is Dermal papillae

24

contains cells that undergo mitosis to form new epidermal cells.

What is stratum basal?

25

The two layers of the dermis, from deep to superficial, are …

Reticular and papillary layer

26

Which cells of the epidermis are part of the immune system?

What are Langerhan's cells

27

The integumentary system has many functions, one of which is

detection of heat and touch

28

which layer of the skin would be most affected from vitamin C deficiency?

The Reticular layer

29

What skin region is responsible for most of the skin's structural strength.

what is the Dermis

30

A yellow pigment derived from plants that can impart a yellow color to the skin is

What is Carotene?

31

Can be converted to vitamin A

What is carotene?

32

Blood vessel dilation in the dermis results in _________ heat loss from the skin, and blood vessel constriction results in _______ heat loss from the skin.

increased, decreased

33

Blood vessels in the ___________ supply epidermal cells with nutrients.

Dermis

34

This is the main fibrous layer of the dermis.

What is the reticular layer?

35

an inflammatory condition of the skin?

What is dermatitis.

36

Fingerprints and footprints are produced by projections into the epidermis called

dermal papillae.

37

The term "stratum germinativum" is sometimes used to refer to the

stratum basale.

38

The bluish tinge of skin due to a reduction of oxygen in the blood is called

cyanosis

39

Deepest epidermal layer firmly attached to the dermis

Single row of stem cells

Also called stratum germinativum: cells undergo rapid division

Journey from basal layer to surface

Takes 40–56 days

What is Stratum Basale (Basal Layer)?

40

Cells contain a weblike system of intermediate prekeratin filaments attached to desmosomes

Abundant melanin granules and dendritic cells

8-10 layers

What is Stratum Spinosum?

41

Thin; three to five cell layers in which the cells flatten

Keratohyaline and lamellated granules accumulate

What is Stratum Granulosum (Granular Layer)?

42

In thick skin only

Thin, transparent band superficial to the stratum granulosum

A few rows of flat, dead keratinocytes

What is Stratum Lucidum?

43

20–30 rows of dead, flat, keratinized membranous sacs

Three-quarters of the epidermal thickness

Functions

Protects from abrasion and penetration

Waterproofs

Barrier against biological, chemical, and physical assaults

What is Stratum Corneum?

44

Structure: Superficial part of the skin; stratified spamous epithelium; composed of four of five strata.
Function: Prevents water loss and the entry of chemicals and microorganisms
Protects against abrasion and ultraviolet light
produces vitamin D
Gives rise to hair, nails, and glands

What is epidermis?