Differentiate between an artery and a vein. - 3 points
Solution:
Differences are as follows:
| Arteries | Veins |
| Arteries are thick-walled | Veins are thin-walled |
| Blood flows under high pressure in the arteries | Bring back blood from the organs to the heart and blood is no longer under pressure. |
| Arteries are generally red in color since they carry pure, oxygenated blood | Veins are generally blue in color since they carry impure, deoxygenated blood. |