STRUCTURE OF THE EPIDERMIS

Question 1

1.
- most superficial epidermal layer
- cells have no nuclei and are dead

Answer 1

Stratum Corneum

Question 2

2.
- cells lose their nuclei and become clearer

Answer 2

Stratum Lucidum

Question 3

3.
- cells are flattened
- process of the cells by the structural protein keratin begins in this layer

Answer 3

Stratum Granulosum

Question 4

4.
- spinous and prickle cell layer
- composed of polyhedral keratinocytes and are joined together with desmosomes
- forms a spindle

Answer 4

Stratum Spinosum

Question 5

5.
- consists of a single layer of dividing cells
- pigmented cells or melanocytes may also be present in this area
- fresh, young skin

Answer 5

Stratum Basale