Helping the library has never been easier! Use the following link to shop and Amazon will automatically donate 0.5% of the price of your eligible AmazonSmile purchases to the Friends of Crawford County Library! Just click and shop as usual...Bookmark it! http://smile.amazon.com/ch/38-3413436.
Circulation. (Science: physiology) movement in a regular or circuitous course, as the movement of the blood through the heart and blood vessels. Origin: L. Circulatio. Please contribute to this project, if you have more information about this term feel free to edit this page.
The pulmonary circulation is a short loop from the heart to the lungs and back again, and the systemic circulation sends blood from the heart to all the other parts of our bodies and back again.The heart is the key organ in the circulatory system.