Gas Exchange

Question 1

Lungs

Answer 1

Big pink sponges protected by the ribcage

Question 2

Diaphragm

Answer 2

A muscle thats sits underneath the ribcage

Moves up when it relaxes and down when it contracts

Helps to get air in and out of lungs

Question 3

Trachea

Answer 3

Air goes through here

Splits into tubes called bronchi (bronchus)

Question 4

Bronchus

Answer 4

Splits into smaller tubes called bronchioles

Question 5

Bronchioles

Answer 5

End at small air sacs in the lungs called alveoli

Gas exchange takes place here

Question 6

Process of gas exchange

Answer 6

1. Air is inhaled into the lungs
2. Some of the oxygen passes into the bloodstream to be used in respiration
3. Carbon dioxide is a waste product of respiration and in the lungs, it passes out of the blood and is then breathed out
4. The gases pass into or out of the bloodstream by diffusion

Question 7

Lungs adaptation

Answer 7

Moist

Good blood supply

Alveoli give them a large surface area