Integumentary system

Question 1

What are the layers of epidermis from up to down?

Answer 1

Corneum
Lucidum
Granulosum
Spinosum
Basale

Question 2

What is the characteristic of stratum corneum?

Answer 2

-20 to 30 layers
-Dead keratinocytes

Question 3

What is the characteristic of stratum lucidum?

Answer 3

Only in thick skin(palms and sole of foot)

Question 4

What is the characteristic of stratum granulosum?

Answer 4

-3-5 layers of flattened and dead keratinocytes
-Transition between living and dead cells

Question 5

What is the characteristic of stratum spinosum?

Answer 5

-8-10 layers of keratinocytes
-Langerhans cells
-Provides skin strength and elasticity

Question 6

What is the characteristic of stratum basale?

Answer 6

-The deepest layer of skin
-Highly mitotic

Question 7

Function of keratinocytes

Answer 7

Protects and waterproof the skin

Question 8

Function of melanocytes

Answer 8

Produces melanin,which contributes to skin color and absorbs UV light

Question 9

Function of Langerghans cells

Answer 9

-Participates immune system
-Easy damage to UV lights

Question 10

Function of merkel cells

Answer 10

In the deepest layer of the epidermis
-Touch and sensation

Question 11

What are the layers of dermis?

Answer 11

Papillary and reticulary

Question 12

Function of dermis?

Answer 12

Rich supply of blood and collagen

Question 13

Characteristics of papillary layer

Answer 13

-Superficial portion of dermis
-Areolar connective tissue w/elastic fibers

Question 14

Characteristics of reticular layer

Answer 14

-Deeper portion of the dermis
-Dense irregular connective tissue with collagen and elastic fibers
-Strenght and elasticity to skin
-Contains hair follicle, nerves, sebaceous and sudoriferous glands