Skin

Question 1

What is the skin and its functions

Answer 1

Largest organ in the body
Responsible for: protection, regulation, sensation

Question 2

What are the three major parts of the skin

Answer 2

epidermis, dermis, subcutis

Question 3

Explain the epidermis

Answer 3

made of stratified keratinised squamous epithelium

No blood vessels or nerve endings

deeper layers have interstitial fluid from the dermis which provides oxygen and nutrients and this drains away as lymph

several layers (strata) of cells

Extend from the deep basil air to the most superficial stratum corneum 

Question 4

Explain the dermis

Answer 4

tough and elastic

Formed from connective tissue

Matrix contains collagen fibres interlaced with elastic fibres

Collagen fibres find water and give skin it’s tensile strength

Fibroblasts macrophages and mast cells are the main cells

Question 5

Explain structures where the dermis is found

Answer 5

small blood and lymph vessels
Sensory nerve endings
Sweat glands and ducts
Hares, arrector pili muscles and subaqueous glands

Question 6

Explain the subcutis

Answer 6

deeper layer of the dermis

Mainly fat and connective tissue

Question 7

Label the diagram of the skin

Answer 7

go to PowerPoint and find it