What happens to the iron from the heme group after a red blood cell is destroyed?
It is transferred to the liver or bone marrow
What is bilirubin converted from the heme group used for?
To form bile for digestion of fats
What diffuses out of a cell at the same time as oxygen diffuses in?
Carbon dioxide
Where does carbon dioxide go in the venous system?
Interstitial fluid
What does deoxygenated hemoglobin in venous blood take up to form?
Carboxyhemoglobin
Where does carboxyhemoglobin release carbon dioxide?
At the respiratory membrane
How is carbon dioxide transported in the blood?
In several different ways
Where does carbon dioxide enter the lung and get exhaled?
In the breath
What is the Greek word for red?
Erythro
What is the most numerous type of blood cell?
Red blood cells
What percentage of the body's cells are red blood cells?
Approximately one-quarter
Are red blood cells constantly regenerated and disposed of?
Yes