The respiratory system works closely with the ____ system, exchanging gases between air and blood.
oxygen, carbon dioxide
Homeostatic roles of the respiratory system are to regulate blood pH and blood ____ and ____ ____ levels.
____ Respiration - exchange of gases between blood and body cells. Occurs at capillaries of the body.
____ Respiration - process that take place in the cells of organisms to convert energy from food into usable energy for the body.
Air is warmed, moistened, and filtered as it is inhaled through the nostrils into the ____ ____.
The ____ acts as a lid or flap that covers the larynx and trachea (airway) so that food does not enter the lungs.
passageway, smell, filter, warm
The upper respiratory tract functions as a ____ for respiration, as receptors for ____, to ____ larger foreign material, to moisten and ____ incoming air, and to resonate chambers for voice.
The ____ are a network of smaller ____ leading from the bronchi into the lung tissue and ultimately to air sacs.
1, pulmonary, Gas
The alveolar wall membranes are _ cell thick and are surrounded by ____ capillaries. ____ exchange takes place here.
Gaseous exchange is the ____ of the oxygen and carbon dioxide that takes place in the alveoli part of the lungs.
Carbon dioxide is dissolved in blood ____, bound to hemoglobin, or is found in the form of plasma ____.