What is the difference between extrinsic and intrinsic clotting?

They're two different clotting pathways that use different factors. Though, the intrinsic and extrinsic pathways come together at factor X and eventually result in fibrinogen (factor I)  being converted into a fibrin clot by prothrombin (factor II). 

Extrinsic begins with factor VII and intrinsic begins with factor XII

light dependent reactions:

release oxygen during the photolysis of wateroccur in the granaproduce atp

light independent reactions:

fix carbon dioxide occur in the stromaproduce glucose

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