MCQOPTIONS
Saved Bookmarks
| 1. |
The upper two chambers of human heart are called ______ and the two lower chambers are called _______. |
| A. | Atria, ventricles |
| B. | Atrium, venules |
| C. | Auricles, veins |
| D. | Aorta, ventricles |
| Answer» B. Atrium, venules | |