respiratory system
what's the main organ of the respiratory system?
the lungs
where dose the digestive system start?
the mouth
what dose the heart pump?
blood
what is the control centre of your body?
the brain
what cells defend your body?
white blood cells
what is the windpipe in the respiratory system called?
The trachea
how long is the small intestine?
32 feet
what is the powerhouse of a cell?
the mitochondrion
what part of the lungs does gas exchange take place?
the alveoli
how long does it take for the digestive system to digestive food?
3 days
how long can you hold your breath before you die?
90 seconds
what disorder causes stomach acid to flow into the esophagus?
heartburn
what do the letters in DNA stand for?
deoxyribonucleic acid
what disorder can cause inflamed airways shortness of breath?
asthma
how long can you go without eating?
1 week
how many cells make up a human body?
40 trillion