blood - the fluid (red in vertebrates) that is pumped by the heart; "blood carries oxygen and nutrients to the tissues and carries waste products away"; "the ancients believed that blood was the seat of the emotions"

somatic cell, vegetative cell - any of the cells of a plant or animal except the reproductive cells; a cell that does not participate in the production of gametes; "somatic cells are produced from preexisting cells";

leucocyte, leukocyte, WBC, white blood cell, white blood corpuscle, white cell, white corpuscle - blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system

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"

erythrocyte, RBC, red blood cell - a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus