Week 3: layers of the Epidermis

Question 0

stratum lucidum

Answer 0

2nd layer under stratum corneum, clear layer

not present in all animals, but when present, its found in areas of high wear and tear (foot pads)

Question 1

stratum corneum

Answer 1

superficial layer
consists of layers of dead, highly keratinized, flattened cells

also called the HORNY layer

Question 2

stratum granulosum

Answer 2

3rd layer under the stratum lucidum

contains keratin granules

Question 3

stratum spinosum

Answer 3

4th layer under the stratum granulosum

thickest layer in hairless, and high wear and tear areas

also called the PRICKLE or SPINOUS LAYER

Question 4

Stratum basale

Answer 4

5th, deepest layer

continually multiplies to replace cells lost from the surface

Question 5

keratinization

Answer 5

development of the hard, protein constituent of hair, nails, epidermis, horny structures, and tooth enamel.

happens in the stratum spinosum layer

Question 6

Desquamation

Answer 6

process in which cell organells gradually dissolve

happens in the stratum spinosum layer

Question 7

cuboidal

Answer 7

cubelike cells arranged in rows

found in the stratum basale layer