🧪01
Blood Composition
Spin a tube of blood. Meet the plasma, the buffy coat, and the red cells.
Open →🔬02
The Formed Elements
Meet the red cells, the five white cells, and the platelets.
Open →🌳03
Hematopoiesis
Follow one stem cell in the marrow as it branches into every blood cell.
Open →💨04
Oxygen Transport
Watch a red cell pick up O₂ in the lungs and drop it off in the tissues.
Open →🩹05
Hemostasis
See how vessel squeezing, a platelet plug, and clotting stop bleeding.
Open →🅰️06
Blood Types
Pick an ABO/Rh type. See who it can give blood to and get blood from.
Open →