Human Respiratory System

Question 1

List the steps for breathing in

Answer 1

1) air enters the nose
2) air travels through the windpipe
3) air enters the lungs
4) ribcage moves upwards & outwards
5) diaphragm moves upwards
6) Lungs inflated with air
7) oxygen enters the blood 8 gaseous exchange occurs at the air sacs( covered with many air sacs )
8) Carbon dioxide is released from the blood

Question 2

List the steps for breathing out

Answer 2

1. Diaphragm moves upwards
2. Ridcage moves downwards and inwards.
3. Lungs will deflate
4. Air travels through the windpipe
5. Air leaves the nose into the surrounding air.