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

Which 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

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