What is the role of gills in respiration?
A. Gills store nutrients for the fish.
B. Gills are used for swimming and navigation.
C. Gills help in regulating body temperature.
D. Gills facilitate respiration by extracting oxygen from water and expelling carbon dioxide.
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What is the role of hemoglobin in respiration?
A. Hemoglobin is responsible for the production of red blood cells in the bone marrow.
B. Hemoglobin regulates blood pH levels by binding to hydrogen ions.
C. Hemoglobin absorbs carbon dioxide in the lungs and releases oxygen in the tissues.
D. Hemoglobin transports oxygen from the lungs to the body’s tissues and carries carbon dioxide back to the lungs.
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