Skin System

Question 1

What is the largest organ in the human body?

Answer 1

Skin

Question 2

What are the three main layers of the skin?

Answer 2

1. epidermis
2. dermis
3. hypodermis (adipose layer)

Question 3

What are the five layers of the skin’s epidermis?

Answer 3

1. stratum corneum
2. stratum lucidum
3. stratum granulosum
4. stratum spinosum
5. stratum basale

Question 4

[Mnemonic]

Come Let’s Get Sun Burned

(how to remember the five layers of the skin’s epidermis (superficial to deep))

Answer 4

Come Let’s Get Sun Burned

C: corneum

L: lucidum

G: granulosum

S: spinosum

B: basale

Question 5

What are the three major cell types located in the skin’s epidermis?

Answer 5

1. keratinocytes
2. melanocytes
3. Langerhans cells

Question 6

What occurs at the stratum granulosum of the epidermis?

Answer 6

Keratinocytes die and lose their nuclei.

Question 7

What is the function of the stratum corneum of the epidermis?

Answer 7

Contains flattened keratinocytes that prevents pathogen invasion and loss of fluids/salts.

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Question 8

What are the two major types of sweat glands found in the human body?

Answer 8

1. eccrine (found ALL over the body)
2. apocrine (found only in the armpits and pubic region and is responsible for body odor)

Question 9

What is the function of arrector pili muscles (or the process of piloerection) in the skin?

Answer 9

Contracts in response to cold or fear which raises the hairs on the skin.

Question 10

What are the two layers of the skin’s dermis (from superficial to deep)?

Answer 10

1. papillary layer
2. reticular layer