Vasodilation
Vasodilation is where blood vessels widen.[1] It results from relaxation of muscle cells within blood vessel walls. The process is essentially the opposite of vasoconstriction, which is the narrowing of blood vessels.
When vessels widen, blood flow is increased. This in turn decreases blood pressure. Drugs that cause vasodilation are called vasodilators.
Vasodilation Media
3D Medical animation still showing normal blood vessel (L) vs. vasodilation (R)
References
- ↑ "Definition of Vasodilation". MedicineNet.com. 27 April 2011. Archived from the original on 5 January 2012. Retrieved 13 January 2012.