Vasodilation occurs when the smooth muscles in our blood vessels relax and cause the interior of the blood vessels, called the lumen, to become wider in diameter. Due to the increase in space within each vessel, there is less vascular resistance resulting in a much greater rate of blood flow.
Also due to the cardiac output remaining constant but a greater volume of space available, the blood pressure decreases.
- ↑ https://www.medicinenet.com/script/main/art.asp?articlekey=5965
- ↑ Rakhimov, D. A. (2004-2013). NormalBreathing.com. Retrieved from http://www.normalbreathing.com/