| Ancient Egyptians were reputed to have a knowledge of the blood circulatory system that would rival a doctor of today. |
| Caffeine has a stimulating effect on the brain and nerves, the heart and circulatory system, the stomach and intestines. |
| Dance therapy gives a person substantial exercise, strengthens the heart, lungs, circulatory system, and burns calories and cuts down fat. |
| Australian scientists have used a 3D bioprinter to create artificial vascular networks that imitate the body's circulatory system. |
| The galeae are hollow yet contain muscles, tracheae, nerves and an open circulatory system. |
| Not only was Harvey not the discoverer of the circulatory system, he was not the first in Europe. |
