12. What function SPECIFICALLY causes oxygen to diffuse into blood, and CO2 to diffuse
into alveoli?
A. Blood carries oxygen to the lungs and CO2 away from the lungs.
B. Air in the alveoli has a greater concentration of oxygen, and lower concentration of CO2
than the blood in the lungs.
C. Blood passes into capillaries that supply body cells with oxygen, and pick up CO2 as cell
waste.
D. The heart pumps blood to the lungs

Four different thermometers were used to measure the temperature of a sample of pure boiling water. the measurements are recorded in the table below. thermometer temperature reading 1 temperature reading 2 temperature reading 3 w 100.1°c 99.9°c 96.9°c x 100.4°c 102.3°c 101.4°c y 90.0°c 95.2°c 98.6°c z 90.8°c 90.6°c 90.7°c the actual boiling point of pure water is 100.0°c. what can be concluded from the data about the reliability and validity of the thermometers?