part 1

Question 1

step 1

Answer 1

We inhale air through out nose. The air enters out nasal cavity where it is moistened, filtered, and warmed.

Question 2

step 2

Answer 2

Air continues down past the back of your though known as the pharynx and then past the epiglottis which prevents food from entering.

Question 3

step 3

Answer 3

Next the air travels down the trachea until it comes to the bronchi that branch off into the left and right lungs.

Question 4

step 4

Answer 4

The tubes bringing the air into your body get smaller and smaller. These tubes are now call bronchioles.

Question 5

step 5

Answer 5

At the end of these tubes are little sacs called alveoli. Here a gas exchange takes place.

Question 6

step 6

Answer 6

Oxygen is transferred out of the air and into the blood carried in the capillaries that surround the alveoli.

Question 7

step 7

Answer 7

At the same time carbon dioxide is being transferred from the blood back into the alveoli.

Question 8

step 8

Answer 8

The air containing carbon dioxide is breather out as your diaphragm flexes up causing you to exhale.