IMO Practice Test — The Human Body: Working Systems
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
medium
Why is it important to chew food well?
It cleans teeth only
It tastes worse
It fills the stomach with air
Smaller pieces are easier to digest
Explanation: Well-chewed food digests more easily.
Question 2 of 6
hard
When you touch something hot and pull back at once without thinking, this fast action is a…
Sneeze
Reflex
Yawn
Snore
Explanation: A quick automatic response is a reflex.
Question 3 of 6
hard
Tiny living parts of blood that fight germs are the white blood…
Hairs
Bones
Nerves
Cells
Explanation: White blood cells fight germs in the body.
Question 4 of 6
hard
A sheet of muscle below the lungs that helps us breathe in and out is the…
Rib only
Skull
Diaphragm
Heart
Explanation: The diaphragm moves to pull air in and push it out.
Question 5 of 6
hard
Blood also carries waste like carbon dioxide to the lungs to be…
Stored forever
Eaten
Breathed out
Frozen
Explanation: Blood takes carbon dioxide to the lungs to be removed.
Question 6 of 6
medium
If one system, such as the lungs, stops working, the body suffers because the systems are…
Not important
Completely separate
Dependent on each other
Just for show
Explanation: Body systems depend on each other to keep us alive.