PATHOLOGY

Detailed explanation-1: -Vascular Phase. In the vascular phase, small blood vessels adjacent to the injury dilate (vasodilatation) and blood flow to the area increases. The endothelial cells initially swell, then contract to increase the space between them, thereby increasing the permeability of the vascular barrier.

Detailed explanation-2: -A hallmark of acute inflammation are changes in vascular flow and caliber which occur in an orderly sequence of events and eventually results in increased vascular permeability and exudation of fluid containing plasma proteins (edema).

Detailed explanation-3: -So, the correct answer is, ‘Vasodilation → Adhesion → Emigration → Chemotaxis → Diapedesis → Phagocytosis.

Detailed explanation-4: -After an inflammatory mediator is released in the bloodstream, a period of transient vasoconstriction, lasting only a few seconds, occurs. Then blood vessels expand to undergo vasodilation from the stimulus of the vasoactive inflammatory mediator, which increases blood flow to the area.