Brain Capillaries: Heterogeneity Is the Word of Order
نویسندگان
چکیده
Capillaries are the smallest vessels of the circulatory tree, having similar functions for the entire body, but also functions that are specific for a certain type of organ or tissue. Capillaries are composed of endothelial cells, pericytes that assist them and a basal membrane that envelopes them. Through this review we wanted to emphasize the fact that capillaries are a generic name for a very malleable structure that is found everywhere in the body. We focused on differences that appear generally between capillaries in the body and specifically in the brain, and we went further to search if there are differences within a single capillary network that connects the arterial and venous sides. There are morphological variations of microvessels within the brain and molecular differences within the same capillary tube, differences that appertain to their arterial or venous characteristics.
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