Answer | Crossword Clue |
---|---|
endocardium | The thin, smooth membrane that lines the inside of the chambers of the heart and forms the surface of the valves |
epicardia | A serous membrane that forms the innermost layer of the pericardium and the outer surface of the heart |
epicardium | A serous membrane that forms the innermost layer of the pericardium and the outer surface of the heart |