| 1 | Ventral (or pelvic) fins correspond to the hind limbs of a quadruped. | |
| 2 | They make no distinction between frontline and hind the line. | |
| 3 | Our closest relatives straightened their backs and began walking upright on two legs. | |
| 4 | Results The rats implanted with Schwann cells showed a remarkable recovery of the voluntary locomotive function of hindlimbs. | |
| 5 | Theropods were early winged and feathered dinosaurs that walked mainly on their hind legs and were incapable of flight. |