Unit 4. respiratory system

natural

Teacher: Merche

How does our respiratory system work?

It helps us breathe in oxygen and breathe out carbon dioxide.

The oxygen enters and the carbon dioxide leaves.

RESPIRATORY SYSTEM

a) Nose: The nose has two holes called nostrils. b)Windpipe: is a tube that divides into two smaller tubes called bronchi. c)Lungs: are two sacks that are protected by our ribs.

It’s made up of the nostrils, the windpipe, the bronchi and the lungs.

RESPIRATORY SYSTEM

PROCESS:1)The air enters our nose (the nose warms the air and the hairs clean it).

1)The air goes down the windpipe and the bronchi into the two lungs.

Windpipe

Bronchi

Lungs

RESPIRATORY SYSTEM

PROCESS:

3) In the lungs, the oxygen passes from the air into the blood

4) The carbon dioxide passes from the blood into the air.

5) The carbon dioxide leave our body when we breathe out.

Carbon dioxide

Oxygen

IMPORTANT VERBS YOU HAVE TO REMEMBER..

Enters = goes into = goes in = breathe in Entrar

Goes out = leaves = breathe out Salir

Clean = limpiar

Warm = calentar

…(oxygen)… passes from…(the air)… into …..(the blood)..