Level 1
Level 2
100

in the circulatory system the main organ is the...... ; it also has blood vessels.

heart

100

cereals provida our body with carbohydrates we need to take .........

energy

200

what is the main organ in the digestive system

stomach

300

the respiratory system helps to...... by respiration.

absorb oxigen.

300

It means that our .... works well, without pain or difficulties.

Body

400

Fnally you carry out an action thanks to the ................. that allows us to move our body.

locomotor system.

500

the excretory system........... from the body.

expels waste.