Respiratory System
The primary organs used for gas exchange.
Lungs
The lower chambers of the heart.
Ventricles
In which circuit (pulmonary or systemic) does blood become oxygenated?
Pulmonary
What is the gas we breathe out (exhale)? Is it acidic or basic?
Carbon dioxide; acidic
The upper chambers of the heart.
Atria
Which component of blood protects the body from pathogens and viruses?
White blood cells
Tiny sacs that take in air; surface is site of gas exchange
Alveoli
Arteries
Does exercise lower or raise tidal volume?
Raise
Three processes of respiration
Pulmonary ventilation, gas exchange, gas transport
Vessels that carry blood to the heart.
Veins
Which valve separates the left ventricle from the aorta?
Aortic valve (semilunar)
Branched structures in the lungs that look like tree branches.
Bronchioles
Largest vein is the...
Vena cava
What makes the 'lub-dub' sound in the heart?
The valves snapping shut during a heart contraction