Respiratory System (Overall)
gas exchange
What is the main function of the lungs?
rib cage and diaphragm
What surrounds the lungs?
oxygen and carbon dioxide
What two gases are exchanged in the lungs?
Capillaries
blood vessels lining the alveoli
out of
in the alveoli, carbon dioxide diffuses (into or out of) the blood
into
in the alveoli, oxygen diffuses (into or out of) the blood
blood
this transports oxygen from the lungs to the cells and carries carbon dioxide from the cells to the lungs
alveoli
tiny air sacs in the lungs
Cilia
tiny structures that sweep mucus upward through the bronchioles, bronchi, and trachea.
diaphragm
Muscle between the chest and abdominal cavities that causes breathing
alveoli
location of capillaries in the lungs
bronchioles
the bronchi branch into smaller tubes called
respiratory system
the function of this body system is to transport gases (oxygen and carbon dioxide) to and from the cardiovascular system
trachea
the main tube that carries air.
breathing
the process of moving air into and out of the lungs
bronchi
the trachea branches off into two ________________
exhale
when the ribs move inward and the diaphragm relaxes upward into the chest cavity
inhale
when the ribs move outward and the diaphragm pushes down on the abdomen
alveoli
where gas exchange takes place in the lungs
