2.64B - Platelets & Blood Clotting
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Edexcel IGCSE Biology
Last updated 11:37 AM on 12/16/24
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6 Terms
1
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what are platelets involved in?
helping the blood clot
2
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What are platelets?
fragments of cells
3
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when are platelets/blood clotting used?
when the skin is broken (like a wound) platelets arrive to stop the bleeding
4
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what do the chemicals released by platelets do?
* cause soluble fibrinogen proteins to convert into insoluble fibrin to form mesh across wound
* mesh traps red blood cells and forms a clot
* clot dries into a sacb
* mesh traps red blood cells and forms a clot
* clot dries into a sacb
5
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what is the function of a scab?
* protects wound
* prevents pathogens entering blood
* prevents pathogens entering blood
6
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why is blood clotting important?
* prevents continued/significant blood loss from wounds
* seals wound to prevent entry of microorganisms
* remains in place until new skin has grown underneath it
* seals wound to prevent entry of microorganisms
* remains in place until new skin has grown underneath it
