6. Which system is responsible for the exchange of oxygen and carbon dioxide between the air and the cells
A. Circulatory
B. Digestive
C. Excretory
D. Respiratory

7. Which organ serves to filter and warm air that entering it.
A. Air sacs
B. Bronchus
C. Diaphragm
D. Nasal Cavity

8. Where does exchange of gases take place?

A. Alveoli
B. Bronchi
C. Bronchioles
D. Diaphragm

9. The chemical process in which oxygen and carbon dioxide are exchanged between the outside air and the cells are called
A. Breathing
B. Inhaling
C. Exhaling
D. Respiration

10. Which of the following are the functions of the respiratory system?

l. Bringing air containing oxygen in the body

II. Releasing carbon dioxide into the atmosphere

III. Exchanging oxygen with carbon dioxide

IV. Transporting oxygen to cells throughout the body.

A. I only

B. I and II

C. I, II and III

D. I, II, III and IV II

1. The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.

2. The nose detects odor molecules and helps filter and warm the air we inhale. The upper respiratory system, or upper respiratory tract, consists of the nose and nasal cavity, the pharynx, and the larynx

3. During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.

4. This exchange of oxygen and carbon dioxide is called respiration.