| ATRIAL | Relating to a chamber of the heart |
| WAXWORK | One might stand in a chamber of horrors |
| SYSTOLE | The contraction of the chambers of the heart - especially the ventricles. (7) |
| LEFTVENTRICLE | Chamber of the heart that pumps oxygenated blood to the arteries (4,9) |
| AURICLE | The upper chamber of the heart |
| VENTRICLE | Each of the two main chambers of the heart that receive blood from the atrium (9) |
| SEPTUM | A partition separating two chambers, such as that between the nostrils or the chambers of the heart |
| LEFTATRIUM | One of the four chambers of the heart (4,6) |
| ATRIUM | One of the two upper chambers of the heart (6) |
| VENTRICLES | Chambers of the heart with thick muscular walls, pumping blood to the arteries (10) |
| ENDOCARDIUM | Thin membrane that lines the chambers of the heart (11) |
| ATRIA | The two upper chambers of the heart (5) |
| MOTMOT | This bird is any of about 10 species of long-tailed forest birds of the family Momotidae (order Coraciiformes) of Central and South America. They lay their eggs in a chamber at the end of a burrow dug |
| KEYS | The lower chamber of the legislature of the Isle of Man (5,2,4) |
| HOUSEOF | The lower chamber of the legislature of the Isle of Man (5,2,4) |
| DAIL | The ___ Eireann is the principal chamber of the Irish parliament, the Oireachtas |
| COD | A carved one hangs in the chamber of the Massachusetts House of Representatives |
| DUMA | The State --- is the lower chamber of the Russian parliament (4) |
| CHUM | A chamber-fellow, companion, comrade or crony; anglers' groundbait of chopped fish; a keta salmon; or, a former name of meaty meals prepared by Pedigree for pet pooches (4) |
| BUNDESRAT | Term applied to the federal legislative chamber of the German Empire (1871-1918) (9) |
