40. Which of the following is not a blood cell? a.Erythrocyte b.Leukocyte c.Osteocyte d.Monocyte Bonus:41.What characteristic is not true of normal thrombocyte? a. They average 4,500 for each cubic mm of blood b. They are also called platelets c. They initiate the blood clotting process d. They are parts of megakaryocytes 42. The normal leukocyte cell: a. Can only be produced in the lymphatic tissue b. Goes to the infection site to engulf and destroy microbes c. Is too large to move through the capillary wall d.Average number is 12,000/cubic mm 43. Mature erythrocytes contain all but one of the following elements: a.Rh factor b.Antigens of blood group c. Hemoglobin d.Nucleus