Figure 7: Normal capillary with a red blood cell (RBC) devoid of PM in a low pollution exposed dog. A few caveolae are seen (short arrow) and there is no PM in the endothelial cell (EC) cytoplasm. TEM x 72,900 B. MCMA 5.4 year old dog transmission electron micrograph of a blood vessel showing an endothelial cell (EC) with numerous cytoplasmic clusters of nanosized particles (short white arrow) on average 28 nm in association with increased caveolae (short black arrows). An intraluminal red blood cell (RBC) shows numerous nanosized particles (long white arrows). TEM x 72,900.

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