RESPIRATORY SYSTEM LUNGS & AIR PASSAGES. WHY ARE THEY NEEDED n TAKE IN OXYGEN – GAS NEEDED BY ALL BODY CELLS n REMOVING CARBON DIOXIDE – GAS THAT IS A.
Respiratory System. Lungs and Air Passages Nose, pharynx, larynx, trachea, bronchi, alveoli and lungs Responsible for – 1. Taking in O2 (needed by all.
Respiratory System trachea bronchus (bronchi) bronchioles.
Respiratory System Gas Exchange Introduction What is our atmosphere made of? Nitrogen 78%, Oxygen 21%, Other 1% Why is breathing important? –Exchange.
