The physiologist is back on duty with another sketch for you! A pretty easy sketch so I had to make a little twist for you....
In most Anatomy and Physiology textbooks the pictures are somewhat standard ...specifically colors of things, like internal organs. For some reason arteries (carrying oxygen filled blood) are always RED, and veins (carrying blood filled with carbon dioxide) are always BLUE. For example, take a look at this diagram of the heart and lungs...
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