Functional hyperemia is the phenomenon by which active brain regions induce a local increase in blood flow to match their energy demands, via a process termed neurovascular coupling. Traditionally, ...
For instance, in the vasculature of the brain, blood vessels oscillate, expanding and contracting as needed. When there is neural activity, the arterioles expand to increase blood flow, oxygen and ...
In five independent studies fibrous thickening of the arterioles and arteries were studied microscopically in men who died and came to autopsy. The locations were the trachea and main bronchi, the ...
Vasoconstriction must be balanced with vasodilation, particularly in the arterioles that supply tissues with blood. Endothelial cells protrude through holes in the internal elastic lamina in ...
Changes in neuronal activity are accompanied by the release of vasoactive mediators that cause microscopic dilation and constriction of the cerebral microvasculature and are manifested in macroscopic ...
The coronary arterial system is composed of three compartments with different functions, although the borders of each compartment cannot be clearly defined anatomically 2 (Figure 1). The proximal ...
A spider nevus is a collection of small, dilated arterioles (blood vessels) clustered very close to the surface of the skin. The cluster of vessels is web-like, with a central spot and radiating ...
Arteries carry oxygenated blood away from your heart. They have thick walls and a muscular layer that keeps your blood moving. Arteries can be as wide as a nickel (about two centimeters). They are the ...
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