You breathe all the time because the body requires
Carbondioxide
Oxygen
Nitrogen
All of these
Heart beats _______ times per minute.
70
72
80
68
Process of taking in and giving out of air
Breathing
Pumping
Moving
None of these
__________ are the passages or holes in the nose through which we breathe.
Nostrils
Oesophages
Mouth
The lungs and heart are protected by the
Rib cage
Backbone
Skull
Medulla
Small bag-like structure in which air goes in and out are the
Heart
Kidneys
Lungs
Oxygen is necessary for providing _____ in the body.
Energy
Fats
Proteins
Calcium