Which is known as the river of life ?
Water
Blood
Saliva
Amino acid
Which of the following are found in millions inside our lungs?
Air sacs
Nerves
Vessels
Pulses
Which organ helps us to take in air?
Heart
Lungs
Food pipe
Nose
What is the process of breathing in air called ?
Inhalation
Exhalation
Circulation
Germination
What is rib cage made of ?
Muscles
Bones
.Which is the gas that is exhaled from human body?
Oxygen
Hydrogen
Nitrogen
Carbon dioxide
Which is the better way to breathe ?
Through Nose
Through Mouth
Through Heart
Through Windpipe
How are our lungs connected to the nose ?
Through Wind pipe
Through Lungs
Through Nerves
Which system in our body helps us to carry out the process of respiration ?
Circulatory system
Respiratory system
Reproductive system
Muscular system
Which of the following helps us to breathe?
Rib cage
