What is the main organ of respiratory system on human? *

A. lungs

B. heart

C. liver

D. ribcage

What is the part of lungs as a place to exchange the gases (oxygen n carbon dioxide)? *

A. lobus

B. bronchus

C. bronchiloes

D. alveoli

When body's cell combines with oxygen and glucose produce energy, water and carbon dioxide to support life, it is the process of … *

A. wind

B. air

C. breathing

D. respiration

How many times in a day do we inhale and exhale? *

A. 20

b. 2000

C. 20,000

D. 200, 000

iWhich side of lungs has smaller size? *

A. left side
B. right side
C. both sides
D. none

What is the part of nasal cavity that helps to filter the dust along with the air we inhale? *

A. oral cavity
B. nostril
C. liquid
D. cilia

The process of taking in and out the air is called … *

A. wind
B. air
C. breathing
D. respiration

What is the transparent layer that protect the lungs? *

A. alveoli
B. pericardium
C. pleura
D. lobus

What is muscle sheet that helps in the respiratory system? *

A. alveoli
B. diagram
C. diaphragm
D. bronchus​

What is the main organ of respiratory system on human? *