Integumentary

Question 1

Corneum

Answer 1

Outermost layer that consists of dead keratinocytes

Provides a tough protective barrier against damage, pathogens and water loss

Question 2

Lucidum

Answer 2

Thick skin only (palms and soles)
Thin clear layer of dead keratinocytes

Adds extra layer of protection and helps barrier function in areas of high abrasion

Question 3

Granulosum

Answer 3

Has keratinocytes with granules of keratohyalin and lamellar bodies

Water proofs the skin and helps form the barrier to prevent water loss

Question 4

Spinosum

Answer 4

Composed of several layers of keratinocytes w spiny projections

Provides strength and flexibility to the skin contains Langerhans cells that play a role in immune response

Question 5

Basale

Answer 5

Deepest layer consisting of simple columnar or cuboidal keratinocytes also has merkel cells

Responsible for the continuous production of new keratinocytes through cell division