Integumentary System

Question 1

What makes up the integumentary system?

Answer 1

Skin (primary organ) and its accessory organs (hair, nail, and glands

Question 2

What are the structures of the skin

Answer 2

Epidermis, dermis, and subcutaneous tissue (hypodermis)

Question 3

What is the epidermis

Answer 3

Outer layer, thin cellular membrane

Question 4

What is the dermis

Answer 4

Next layer, dense fibrous, connective tissue

Question 5

What is subcutaneous tissue (hypodermis)

Answer 5

Thick, fat-containing tissue. Lipocytes are predominant in subcutaneous layer

Question 6

What are the layers in the epidermis

Answer 6

Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale

Question 7

Describe stratum basale

Answer 7

-Deepest layer of cells
-Called stratum germinativum
-Combination of Merkel cells, melanocytes, keratinocytes, and stem cells that divide repeatedly

Question 8

Describe stratum spinosum

Answer 8

-8 to 10 cell layers held together by desmosomes
-during cell preparation, cells shrink and look spiny

Question 9

Describe stratum granulosum

Answer 9

-3 to 5 cells of flat dying cells
-has lamellar granules that release lipid that repels water

Question 10

Describe stratum lucidum

Answer 10

-seen in thick skin on palms and soles of feet
-3 to 5 layers of clear, flat, dead cells
-has precursor of keratin

Question 11

Stratum corneum

Answer 11

-25 to 30 layers of flat dead cells filled with keratin and surrounded by lipids
-constantly sheds
-barrier to light, heat, water, chemicals, and bacteria