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