Anemia is defined as?

Anemia is defined as?

• A. A single celled animal.
• B. A disease that can be transmitted from animals to humans.
• C. The study of parasites.
• D. A decrease in the number of red blood cells.

Answer: (D)

Anemia is defined as a decrease in the number of red blood cells, which lowers the blood's capacity to carry oxygen to tissues. Red blood cells contain hemoglobin, the protein that binds oxygen; when their numbers fall, tissues receive less oxygen, leading to signs like pale mucous membranes, fatigue, and rapid breathing or heart rate. This definition focuses on the amount of circulating red blood cells, not on parasites, diseases that spread between animals and humans, or the study of parasites. For context, other blood conditions involve different components (for example, an increased number of red cells is polycythemia, while issues with white blood cells or platelets involve other cell lines). Anemia can result from blood loss, decreased production, or increased destruction of red blood cells, and diagnosing it relies on measuring hematocrit or hemoglobin levels in the blood.

Anemia is defined as a decrease in the number of red blood cells, which lowers the blood's capacity to carry oxygen to tissues. Red blood cells contain hemoglobin, the protein that binds oxygen; when their numbers fall, tissues receive less oxygen, leading to signs like pale mucous membranes, fatigue, and rapid breathing or heart rate. This definition focuses on the amount of circulating red blood cells, not on parasites, diseases that spread between animals and humans, or the study of parasites. For context, other blood conditions involve different components (for example, an increased number of red cells is polycythemia, while issues with white blood cells or platelets involve other cell lines). Anemia can result from blood loss, decreased production, or increased destruction of red blood cells, and diagnosing it relies on measuring hematocrit or hemoglobin levels in the blood.