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What are red blood cells also known as?,Erythrocytes
How many red blood cells are there in the body?,Approximately 3 trillion
What is the function of red blood cells?,To carry oxygen to cells and tissues
How many red blood cells are produced and destroyed every second?,A few million
What is the biomolecule found in the cytoplasm of red blood cells?,Hemoglobin
What does the heme group in hemoglobin bind to?,Oxygen
Where does oxygen get released by hemoglobin?,In the capillaries
What color are red blood cells with heme-bound oxygen?,Bright red
What color are red blood cells in the venous system?,Dark red
What happens to the organelles of red blood cells during differentiation?,They are lost
What is the lifespan of a red blood cell?,About four months
Where are old red blood cells destroyed?,In the liver or spleen
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
What retains its function in red blood cells after differentiation?,Their membranes
What happens to the rest of the heme group after iron is removed?,It is converted to bilirubin
What gives plasma its characteristic straw color?,Bilirubin
What does the liver use bilirubin for?,To form bile
What is the role of phagocytes in the destruction of red blood cells?,To remove and destroy them
What happens to the iron from the heme group that is transferred to the bone marrow?,It is used in the production of new hemoglobin
What is the function of bile formed by the liver?,To help with the digestion of fats