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Capillaries Illustration and Icon
Capillaries
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A schematic of microcirculation depicts an arteriole (red) branching into a dense capillary bed that drains into a venule (blue). The illustration represents blood vessels—specifically a capillary network—within the circulatory system, a structure studied in anatomy, histology, and physiology. It shows hierarchical flow from small arteries (arterioles) to capillaries to small veins (venules), where exchange of oxygen (O2), carbon dioxide (CO2), nutrients, and metabolic wastes occurs across thin endothelial walls. The site indicates a generic systemic tissue microvascular bed that enables perfusion and maintains tissue homeostasis.
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