Unit 6 : Skin Flashcards Preview

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Flashcards in Unit 6 : Skin Deck (54)
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1

Skin Layers

There are Two (2) layers of skin:

  • Epidermis
  • Dermis

2

Subcutaneous

Its deep below the Dermis , its also called Hypodermis or Superficial Fascia

3

Epidermis

The Epidermis consist of five (5) layers:

(Big . Sweet . Guys . Love . Candy)

  1. Stratum BASAL
  2. Stratum SPINOSUM
  3. Stratum GRANULOSUM
  4. Stratum LUCIDUM
  5. Stratum CORNEUM

4

 

Integumentary System

The Integumentary System is made up of the:

  1. Skin
  2. Nails
  3. Hair
  4. Glands
  5. Nerve Endings

5

Largest Organ

Skin is largest organ of the body

6

 

Stratum BASAL

  • This layer provides new cells by mitotic cell division.
     
  • Stratum Basal is the deepest layer of the five layers of the epidermis.
     
  • The Stratum Basal is most the external covering of skin in mammals.
     
  • The stratum Basal is a single layer of columnar or cuboidal basal cells.

7

Stratum SPINOSUM

  • It provides structural support, helping the skin resist abrasion. (Spine Like)
     
  • Found between the stratum Granulosum and stratum Basal

8

Stratum GRANULOSUM

- Helps to form a waterproof barrier that functions to prevent fluid loss from the body.

9

Stratum LUCIDUM

  • Is a thin, clear layer of dead skin cells in the epidermis.
  • Found in the PALMS and FEET ONLY

10

Stratum CORNEUM

  • Composed of flat, dead cells that continually flake away
  • Is a vital barrier of the skin
  • The horny outer layer of the skin (Crown Like Shape)

11

 

Epidermal Layers - Order

Come  :: Lets  :: Get  :: Sun  :: Burnt

- From top to bottom -

  1. CORNEUM
     
  2. LUCIDUM
     
  3. GRANULOSUM
     
  4. SPINOSUM
     
  5. BASAL

12

Epidermis Cells Anatomy

EPI = Above, top layer of skin Keratinocytes Melanocytes Langerhans Merckel

13

Keratinocytes

are the primary type of cell found in the epidermis, the outermost layer of the skin. It is an epidermal cell that produces keratin protein, waterproofs, protects, (never needs ironing).

14

Dermis Cells Anatomy

  1. Dermal Papillae
     
  2. Meissner’s Corpuscles
     
  3. is Extensibility = stretch ability
     
  4. is Elasticity = bounce back ability

15

Dermal Papillae forms?

Fingerprints

16

Meissner’s Corpuscles

are found in the upper dermis, they are found primarily in the glabrous skin on the fingertips and eyelids.

17

Fingerprints

- Conform to the underlying dermal papillae - Increase grip by increasing friction - Comes in, loops, arches, whorls (LAW)

18

Where does Callus occurs

Epidermis

19

Where does Stretch Marks occurs

Dermis

20

Skin Thickness

The closest estimate of the average thickness of the skin is 1.5 mm

21

New Skin frequency

We get new skin every 2-4 weeks

22

Percentage of Household Dust

Seventy-five (75%) percent of house dust is dead skin

23

Why skin color varies

Skin color results from differences in exposure to ultraviolet radiation (UVR)

24

UVR has a Desirable Effect

UVR helps stimulates synthesis of vitamin D necessary for dietary calcium absorption.

25

Skin Color : Black People

People native to the tropics and their descendants tend to have well-melanized skin to screen out excessive UVR

26

Skin Color : Black

People native to the tropics and their descendants tend to have "well-melanized" skin to screen out excessive UVR - Melanin

27

Skin Color : White

Their skin color consist of blood hemoglobin and carotene with little melanin People native to far northern latitudes where the sunlight is weak, tend to have light skin to allow for adequate UVR penetration.

28

Skin Color : Albinos

Lack melanocytes

29

Skin Color : Asians

Carotene

30

Abnormal Skin Colors

  1. Cyanosis is blueness
     
  2. Erythema is redness can be from sunburn
     
  3. Jaundice is yellowness
     
  4. Pallor is paleness