CIE IGCSE Biology: 复习笔记：9.1.15 Blood Clotting

• Platelets are fragments of cells which are involved in blood clotting and forming scabs where skin has been cut or punctured
• Blood clotting prevents continued / significant blood loss from wounds
• Scab formation seals the wound with an insoluble patch that prevents entry of microorganisms that could cause infection
• It remains in place until new skin has grown underneath it, sealing the skin again

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