Circulation
The heart pumping the same blood round and round the body: out through arteries, through tiny capillaries where oxygen and food reach the cells, and back through veins - in two loops, one to the lungs and one to the body.
Depth 1 · Foundation
You can describe how blood goes round the body through arteries, capillaries and veins, in two loops, and how William Harvey showed it.
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Foundation
You can describe how blood goes round the body through arteries, capillaries and veins, in two loops, and how William Harvey showed it.
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What's still between you and Circulation, depth 1, in the order you can learn it.