Essentials of Anatomy and Physiology

Blood 267

Factors 5, 7, 8, 9,

10, 11, 12

Platelet factors

Chemicals from

damaged tissue Calcium

ions

Prothrombin

activator

Prothrombin

Calcium

ions

Thrombin

Fibrinogen

Calcium ions

Factor 13

Fibrin

Stage 1

Stage 2

Stage 3

Liver

Figure 11–7. Stages of chemical blood clotting.
QUESTION:Based only on this picture, explain why the liver is a vital organ.