Saturday 14 January 2017

circulatory system - Do blood vessel walls have blood vessels in them?


If so, do those blood vessels have no walls because they don't need them because they're in the same tissue as that of a blood vessel wall? Are the cells alligned diffently at the edge of the blood vessel than in the rest of the blood vessel wall? Do blood vessels in blood vessels have an outer wall defined a sudden change in orientation of the cells?




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