An adult male's lungs can expand to hold ______ of air.
6 litres
15
When your lungs get much bigger, so your diaphragm moves down, and your rib cage moves up and out. This makes space inside your chest. What is this process called?
Respiration process
15
Choose which words do not belong to the group: blood, nose and mouth, trachea, lungs, ovum, alveoli, vulva, tissue cells
