Direction: Read each sentences carefully and write the correct answer in your answer
sheet.
1. It is a system where exchange of gases take place.
a. circulatory system c. respiratory system
b. nervous system d. digestive system
2. These are tiny walled sacs found at the send of each bronchiole?
a. alveoli b. trachea c. bronchi d. lungs
3. Which of the following do not describes lungs?
a. it only expels carbon dioxide c. main organ for respiration
b. organ for exchange of gases d. pair of spongy, air-filled organs
4. Which of the following parts of the respiratory system that serves as passageway of
food, water, and air?
a. trachea and bronchi c. nose and nasal cavity
b. pharynx and larynx d. alveoli
5. How many times we breathe in and breathe out in 1 minute at least the average?
a. 15 b. 10 с. 20 d. 25​