Taking out air is called
Inhalation
Circulation
Exhalation
Purification
The trachea is a part of the respiratory system. What can the trachea also be called and what is its function?
Wind pipe
Releases air out of the body
Tubes, carries air to the lungs
None of these
Which organ helps us to chew the food well?
Tongue
Teeth
Saliva
Jaw
Which teeth helps us grind the food finely as they have plat forms on them?
Incisors
Canines
Pre- molars
Cutting teeth
When we breathing in, which gas is absorbing by the lungs?
Carbon-dioxide
Hydrogen
Nitrogen
Oxygen
Which substance changes lime water into milky white?
Carbon
Where at our lungs situated in our body?
Nostrils
Ribcage
Alimentary canal
The Heart beats more than
One million times
One billion times
Two and a half billion times
Thousand times
We always walk on
Road
Foot path
Zebra line
Our skin helps us to feel things by
Touch
Smell
Taste
Hear