The circulatory system is an organ system that moves nutrients, gases, and wastes to and from cells.
The circulatory system as composed of the cardiovascular system, which distributes blood, and the lymphatic system, which distributes lymph.
![](http://www.daviddarling.info/images/circulatory_system.jpg)
![](http://peer.tamu.edu/curriculum_modules/organsystems/module_4/Images/circulation_heart.jpg)
![](http://scienceblogs.com/purepedantry/upload/2006/12/Bp.jpg)
- The blood pressure as a function of the distance from heart
![](http://classes.midlandstech.edu/carterp/Courses/bio211/chap19/Slide6.JPG)
![](http://www.pycnogenall.com/wp-content/uploads/2011/04/capillary.gif)
The blood flow changes according to the functional status of the tissue
![](http://flipper.diff.org/static/files/879/flussitessuti.jpg)
![](http://alexandria.healthlibrary.ca/documents/notes/bom/unit_2/29no1.gif)
![](http://encyclopedia.lubopitko-bg.com/images/The%20lymphatic%20system%20in%20relation%20to%20the%20cardiovascular%20system.jpg)
Control of blood flow
Brain
Control of cerebral blood flow
Liver