Outside a blood or lymph vessel.
Outside the vascular system as the fluids, which are between the cells in the tissues or between the capillaries and the cells they supply.
Extravascular pertains to anything situated or happening outside the vessels, with a specific focus on blood vessels and lymph vessels. Extravascular fluid is the fluid present outside the circulatory system, within the body tissues.
An allergic reaction to inhaled organic dusts can lead to inflammation and thickening of the tiny air sacs in the lungs. This condition is characterized by the respiratory condition known as “pneumonitis.”