Unit 1.2. Circulatory and respiratory system

The circulatory system transports nutrients and oxygen to our:

• brain

• organs

• bones

• muscles

One of the most important organs is...

They carry blood away from the heart

• veins

• arteries

They carry blood towards the heart

• veins

• arteries

What is this?

They use the oxygen and produce carbon dioxide

• veins

• cells

• arteries

What is their name?

What does our respiratory system expels?

• carbon dioxide

• oxygen

What is the name of the gas we inhale?

Air flows down the _______ into the lungs.

• trachea

• mouth

• bronqui

• diaphragm