Try to answer this questions (post your answers in the comments below, share your work):
1. What is the respiratory system made of?
2. How does it work?
3. How many bronchioles and alvioli do we have in the lungs?
The first question is mandatory to everyone who watches this video, questions 2 and 3 are optional (make the effort, please.)
Came on I'm waiting for your answers.
ResponderEliminar