| Answer | Crossword Clue |
|---|---|
| ATRIA | Two of the four chambers of the heart |
| ATNO | 79, for the chem. symbol at the heart of the four longest puzzle answers |
| MAN | "I go on four legs in the morning, on two legs in the afternoon, and on three legs in the evening ..." |
| ATRIA | Chambers of the heart |
| ATRIA | Upper chambers of the heart |
| VALVE | One of four in the human heart |
