| A simple filter cleans and circulates the water while chayote plants, ginger, and duckweed add oxygen and food. |
| It is caused by a slowing down of the Atlantic Conveyor, the current which circulates water in the ocean. |
| In the hot and humid summer months, air circulates below and throughout the living space above. |
| In the lungs, oxygen enriches the blood, which circulates to the heart's left side in blood vessels called pulmonary veins. |
| A crystal glass fountain that circulates liquid potentized LSD stands in the centre of the hall. |
| They discovered acupuncture before it was known that blood circulates, or that germs cause disease. |
