+The diaphragm muscle drops and creates a vacuum; Air rushes into the lungs; The diaphragm muscle contracts and pushes the air out
*inhale through mouth or nose, are is filtered by cilia and mucus in nose, then the air goes to the pharynx, past the epiglottis, and through your larynx and trachea, at the base of the trachea are two tubes called bronchi which branch off into smaller air tubes called bronchioles, then the air reaches tiny sacs called alveoli where gas exchange occurs
*Oxygen goes to the lungs , has a close contact to blood absorbs it and carries it to all body parts. Blood gives up CO2 which is from lungs to air breathed out
*- active process that allows the diaphragm and intercostal muscles to contract, allowing lungs to expand (diaphragm goes down
*Pharynx > Larynx (voice box) > Trachea (windpipe) > Bronchi > Bronchioles > Alveoli