| Answer | Crossword Clue |
|---|---|
| prothrombins | PROTHROMBIN, a proteinlike substance present in blood plasma |
| prothrombin | a proteinlike substance present in blood plasma |
| prothrombin | A protein present in blood plasma that is converted into active thrombin during coagulation |
| fibrinogen | A soluble protein present in blood plasma, from which fibrin is produced by the action of the enzyme thrombin |
| complement | A group of proteins present in blood plasma and tissue fluid that combine with an antigenûantibody complex to bring about the lysis of foreign cells |
| complements | A group of proteins present in blood plasma and tissue fluid that combine with an antigenûantibody complex to bring about the lysis of foreign cells |
