its the bronchiole
Actually the ribs are moving outward and expanding as the lungs fill with air. The expansion of the ribs makes room for more air to enter the lungs.
do you mean fills with air? if so then its the lungs
Lungs expand to fill with air. It is done during respiration.
This one can be a tricky answer. It could be the lungs if you count them as two individual parts or it can be the lungs and aveoli which are the tiny air sacs within your lungs that also fill up with air when you breath.
its is the lungs come to us and get your answer
To fill your lungs by sucking in air.
it gives them air in the their lungs
When the chest cavity expands and the diaphragm contracts, it creates more space in the chest cavity. The pressure decreases, and pulls on the lungs. The lungs fill with air to compensate for the lost space from the expansion and contraction.
When the body breathes in and out, the diaphragm contracts and flattens to create more space in the thoracic cavity, allowing the lungs to expand and fill with air. During inhalation, the intercostal muscles between the ribs also contract, lifting the ribcage and further increasing the volume of the chest cavity. During exhalation, the diaphragm and intercostal muscles relax, pushing air out of the lungs.
they fill with air so that we can breathe
Diaphragm
it gives them air in the their lungs