BBC1 年
Structure of blood and blood vessels
For example, a capillary is microscopically thin to allow gases to exchange, the arteries are tough and flexible to cope with high pressure blood flow and the veins contain valves to prevent the ...
Verywell Health on MSN3 个月
Portal Vein Function, Location, and Anatomy
The liver has a dual blood supply derived from the portal vein and the hepatic artery. About 75% of that blood flow comes ...
BBC4 年
Structure of blood and blood vessels
For example, a capillary is microscopically thin to allow gases to exchange, the arteries are tough and flexible to cope with high pressure blood flow and the veins contain valves to prevent the ...