The Integumentary System Part 1 (6)

Question 1

What is your biggest organ? What does it do?

Answer 1

Your skin!

1. Protects against extreme temperatures and infection
2. Keeps your fluids balanced
3. Makes Vitamin D from sunlight
4. Helps you sense outside world

Question 2

What 5 organs make up your INTEGUMENTARY SYSTEM?

Answer 2

1. Hair follicles
2. Sweat glands
3. Oil glands
4. Skin

Question 3

BONUS: how do you pronounce “integumentary”?

Answer 3

in - TEG - you - MEN - tery

Question 4

How many layers does your skin have?

Answer 4

1. Epidermis

2. Dermis

Question 5

What is the EPIDERMIS?

Answer 5

The thin, protective top layer of skin made of waterproof cells, melanin-making cells, germ-fighting cells, and nerve ending cells. It has FIVE LAYERS.

Question 6

What is the DERMIS?

Answer 6

The middle skin layer that does most of the work, like pushing the epidermis into the shape of fingerprints, feeling things, supplying blood, and connecting to your body. It has THREE LAYERS.

Question 7

AVASCULAR means…

Answer 7

“Without blood vessels.”

Question 8

“Come, Let’s Get Sun Burned!” helps us remember what?

Answer 8

The five layers (stratum means “layer”) of the epidermis:

1. Stratum CORNEUM
2. Stratum LUCIDUM
3. Stratum GRANULOSUM
4. Stratum SPINOSUM
5. Stratum BASALE

Question 9

What are the dead, tough, waterproof skin cells called?

Answer 9

KERATINOCYTES (ku RAT inow sites)

Question 10

What’s the Stratum CORNEUM?

Answer 10

The hard, waterproof outer layer of your epidermis, made of long-dead, super-tough keratinocytes.

Question 11

What’s the Stratum LUCIDUM?

Answer 11

An extra layer of dead, see-through keratinocytes found only in your thick skin (palms and foot soles).

Question 12

What’s the Stratum GRANULOSUM?

Answer 12

The grainy-looking skin layer just under your tough outer layers, made of living keratinocytes on their way up to the outer layers.

Question 13

What’s the Stratum SPINOSUM?

Answer 13

The prickly-looking layer of newborn keratinocytes.

Question 14

What’s the Stratum BASALE?

Answer 14

The bottom layer of epidermis, where the cells are made and sent on their way up through the other 4 layers.

Question 15

True or false: the epidermis is AVASCULAR.

Answer 15

True!

Question 16

True or false: the dermis is AVASCULAR.

Answer 16

False!

Question 17

What are the 3 layers of the DERMIS?

Answer 17

1. Papillary layer (ridged to help the epidermis above it have a grippy texture in fingers, etc.)
2. Reticular layer (main layer with blood vessels and nerves)
3. Hypodermis (fatty layer that connects everything to your organs)

Question 18

What’s a MELANOCYTE?

Answer 18

Melanin-making cells in your epidermis!

Question 19

What’s a LANGERHANS cell?

Answer 19

Germ-eating cells in your epidermis, sent there from your bone marrow!

Question 20

What’s a MERKEL cell?

Answer 20

Cells connected to the nerve endings in your epidermis, to help you feel the outside world.

Question 21

Your epidermis is either thick or thin skin based on what?

Answer 21

Whether it has an extra layer of dead, clear keratinocytes, called the stratum lucidum.