NCIt definition : Bilayer membrane fragments present in the blood plasma that are released by different
cell types upon activation or death. Extracellular vesicles are usually classified
as either exosomes (formed by the membranes of intracellular compartments, 50-100
nm in diameter) and ectosomes (also called microparticles or microvesicles, formed
from plasma membrane, 100-1000 nm in diameter).;