Hemoglobin is found exclusively in erythrocytes, or red blood cells, which are responsible for transporting oxygen. Other blood components, like neutrophils and lymphocytes, do not contain hemoglobin. Therefore, the correct answer is erythrocytes. ;
Hemoglobin is exclusively found in erythrocytes, which are red blood cells responsible for oxygen transport. Neutrophils, lymphocytes, and thrombocytes do not contain hemoglobin. Therefore, the correct answer is erythrocytes.
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