| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Prior to the 17th century work of William Harvey, it was thought that 2 separate systems distributed this around the body | blood | $400 | DJ | THE LIFE SCIENCES | 2023-03-21 | #8832 | |
| Making transfusions routine, biochemist Karl Landsteiner put together the A-B-O "typing" of this | blood | $1,200 | DJ | SCIENCE | 2012-05-15 | #6377 | |
| Fibrin is the protein that makes this fluid clot | blood | $200 | DJ | LIFE SCIENCE | 1993-05-19 | #2018 |