FIGURE 38.1 The coagulation cascade (light grey) and the sites of action for the natural anticoagulants (black). PC = protein C, APC = activated protein C. Protein S (PS) is a cofactor for the inhibition of factors V and VIII. TFPI (tissue factor pathway inhibitor) levels increase several fold in response to heparin. TFPI binds to factor VIIa, inhibiting the conversion of factor X to Xa, and factor IX to IXa.
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Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...