Body systems

Science, Biology. Usually met in years 7 to 10.

Know the organs of the human body and what they do, including digestion, breathing and the circulation.

What you practise

Moves from the heart and lungs to capillaries and alveoli. Practice moves up a level when a round goes well and down when it does not.

Each sample comes with the method and the reason every wrong option is wrong. Real practice rounds are ten questions at your level.

Sample question, level 2 of 5

What is the job of the lungs?

Show the answer and method

Answer: E, To take oxygen into the blood and remove carbon dioxide

The method: The job of the lungs is to take oxygen into the blood and remove carbon dioxide.

Why the other options are wrong:

A, To contract to move the bones: That is the job of the muscles, not the lungs.
B, To carry blood away from the heart: That is the job of the arteries, not the lungs.
C, To let substances pass between the blood and the cells: That is the job of the capillaries, not the lungs.
D, To break down harmful substances and make bile: That is the job of the liver, not the lungs.

Sample question, level 4 of 5

Which part of the body has this job: to move down and up to help you breathe?

Show the answer and method

Answer: C, diaphragm

The method: The job of the diaphragm is to move down and up to help you breathe.

Why the other options are wrong:

A, muscles: The muscles has a different job: to contract to move the bones.
B, pancreas: The pancreas has a different job: to make digestive enzymes and the hormone insulin.
D, stomach: The stomach has a different job: to break food down using acid and enzymes.
E, large intestine: The large intestine has a different job: to absorb water from the food that is left.