The human gas exchange system

The boxes below contain the names of some structures in the human body.

Which structures are part of the human gas exchange system?

Structure

Lungs

Trachea

Stomach

A

C

D

Heart

B

Bronchi

E

The human gas exchange system

How would you join the boxes to connect each structure you have chosen to its function? One has been done for you.

Function

To allow air to travel from the nose and mouth to the bronchi.

To allow air to travel from the trachea to the lungs.

To absorb carbon dioxide from air and release oxygen from the blood.

B

D

F

To allow air to travel from the trachea to the heart.

C

To allow air to travel from the lungs to the heart.

A

To absorb oxygen from air and release carbon dioxide from the blood.

E

Structure

Lungs

Trachea

Stomach

1

3

4

Heart

2

Bronchi

5