martes, 12 de marzo de 2019

Natural.Respiratory System

Imagen relacionada
It is made up of :

2 nostrils.(2 holes in your nose)
1 windpipe( a long tube)
2 bronchi (2 short tubes)
2 lungs.( 2 sacks protected by ribs)

Resultado de imagen de breathe in out


We breathe in         O2.
We breathe out      CO2.