Chapter 5 Integumentary System Flashcards Preview

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Flashcards in Chapter 5 Integumentary System Deck (12):
1

7 Major Functions of Skin

Thermoregulation via negative feedback
Protection, physical chemical & biological barrier
Cutaneous Sensations
Excretion and Absorbion - Sweat secretion, Absorb heavy metals
Synthesis of Vitamin D
Blood Resivor - Stores up to 5% of blood supply
Immunity

2

What are the 2 major regions of skin

Epidermis & Dermis

3

Epidermis

Outermost superfical layer

4

Dermis

Vascular middle region

5

Hypodermis

Deepest region- not part of the skin!

6

4 Types of epidermal cells

Keratincytes- 90%
Melanocytes- produces melanin-skin pigement
Dendritic Cells - Found in bone marrow
Merkel Cells- Deepest layer of epidermis fuctions as touch receptors

7

Basale Layer

deepest Epidermis layers
single layer of keratinocytes
Rapid Cell Division
Keratinocytes, Melanocytes and Merkel cells found here

8

Stratum Spinosum (prikely layer)

8-10 rows of tightly packed cells
Langerhans and Grandual found here

9

Stratum Granulosum (Granular layer)

3-5 rows of flattened Keratincytes
Different colours
lamellated grandules release lipids=waterproof=death

10

Stratum Lucidium

Not found in all layers of skin- only hands and feet
3-5 layers of clear flat dead cells

11

Stratum Corneum

25-30 layers of flat dead cells filled with keratin

12

How many Epidermal layers are there

4-5