| left atrium | right atrium | left ventricle | right ventricle | |
|---|---|---|---|---|
| A. | oxygenated |
oxygenated |
deoxygenated |
deoxygenated |
| B. | deoxygenated |
deoxygenated |
oxygenated |
oxygenated |
| C. | oxygenated |
deoxygenated |
oxygenated |
deoxygenated |
| D. | deoxygenated |
oxygenated |
deoxygenated |
oxygenated |