CAIE IGCSE Biology 9.4.4 Roles of Blood Clotting

Practise stating the two protective outcomes of blood clotting at a damaged blood vessel or wound.

Exam points

state that a clot seals damaged vessels and prevents excessive blood loss
state that the seal prevents pathogens or harmful microorganisms entering through the wound
answer with these protective outcomes when asked for roles rather than describing clot formation

[Maximum number: 2]

Fig. 6.1 is a photomicrograph of a blood clot.

Fig. 6.1

State the importance of blood clotting.

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