1. In the clotting of blood thrombin catalyses factor XIII into its active form (fibrinase) which causes fibrin to form a stable clot
   - factor XIII

Type of: clotting factor, coagulation factor

• aridness
• Aries
• Aries the Ram
• arietta
• aright
• Ariidae
• Arikara
• aril
• ariled
• arillate
• Arilus
• Arilus cristatus
• Ariocarpus
• Ariocarpus fissuratus
• Ariomma
• ariose
• arioso
• Arisaema
• Arisaema atrorubens
• Arisaema dracontium
• Arisaema triphyllum
• Arisarum
• Arisarum vulgare
• arise
• arishth