Hemoglobin is primarily found in what type of cell?

Hemoglobin is primarily found in red blood cells, which are essential for transporting oxygen throughout the body. Red blood cells contain a high concentration of hemoglobin, a protein that binds to oxygen in the lungs and releases it in tissues that need it. This capability is crucial for sustaining cellular metabolism and maintaining overall body function.

White blood cells are involved in the immune response and do not contain hemoglobin. Platelets play a role in blood clotting and also do not contain hemoglobin. Plasma cells, derived from B lymphocytes, are specialized for producing antibodies and are not associated with hemoglobin. Thus, red blood cells are the correct answer, as they are the only type of cell in which hemoglobin is predominantly found for oxygen transport.