What do red blood cells, white blood cells, and platelets have in common?
A. All are part of lymph
B. All are produced in the bone Morrow
C. All are involved in destroying pathogens
D. All are self-secreting hormones
Platelets are thrombocytes, whose function is to help blood clots form at the site of an injury; red blood cells are erythrocytes, whose function is to carry oxygen to body cells.
