Definitions and order

Question 1

Intercostal muscles:

Answer 1

The muscles between the ribs that contract and relax during breathing, moving the ribcage.

Question 1

Ribs:

Answer 1

The bones that form a protective cage around the lungs and heart.

Question 2

Diaphragm:

Answer 2

A dome-shaped sheet of muscle at the base of the thorax that contracts and flattens during inhalation to increase the volume of the chest cavity.

Question 3

Trachea:

Answer 3

The windpipe that allows air to pass from the mouth and nose into the bronchi. It is supported by rings of cartilage to keep it open.

Question 4

Bronchi:

Answer 4

Two large tubes branching from the trachea, one leading to each lung.

Question 5

Bronchioles:

Answer 5

Smaller tubes branching from the bronchi that carry air to the alveoli.

Question 6

Alveoli:

Answer 6

Tiny air sacs where gas exchange occurs.

Question 7

Pleural membranes:

Answer 7

Thin membranes surrounding the lungs that create a sealed space, helping the lungs expand and reducing friction during breathing.