Lungs

Question 1

What are lungs protected by?

Answer 1

The ribcage

Question 2

What do lungs contain?

Answer 2

Lots of alveoli

Question 3

What is alveoli?

Answer 3

Tiny air sacs in the lungs well adapted to gaseous exchange

Question 4

Why are alveoli well adapted to gaseous exchange?

Name 5 reasons

Answer 4

1. They create a large SA
2. They are moist
3. They have very thin walls
4. The constant movement of the blood and the breathing of the lungs keeps a high concentration gradient
5. The blood capillaries are right next to the alveoli

Question 5

Why Is it good that alveoli have very thin walls?

Answer 5

Less distance for gases to travel

Question 6

Why is it good that the blood capillaries are right next to the alveoli?

Answer 6

Meaning easy access for the oxygen to diffuse into the blood and the CO2 into the lungs

Question 7

Whys it good that the breathing of the lungs keeps a high concentration gradient?

Answer 7

Perfect for diffusion

Question 8

What happens when you breathe out?

Answer 8

You ribcage goes down, your diaphragm goes up

Question 9

What happens when you breathe in?

Answer 9

Ribcage goes up

Diaphragm goes down

Question 10

Who do breathing systems do?

Answer 10

Take air in and out of the the body