S: (n) packed cells (a preparation of blood cells separated from the liquid plasma) "packed cells are given to severely anemic patients in order to avoid overloading the circulatory system with too much fluid"
S: (n) red blood cell, RBC, erythrocyte (a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus)
S: (n) blood (the fluid (red in vertebrates) that is pumped through the body by the heart and contains plasma, blood cells, and platelets) "blood carries oxygen and nutrients to the tissues and carries away waste products"; "the ancients believed that blood was the seat of the emotions"