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Updated: June 18, 2025
We must now inquire the real names of whatever has figured in our story. The two great compartments are called ventricles, the two small pouches auricles, and they are also distinguished as being on the right or left side; right ventricle, left ventricle, right auricle, left auricle. The inner doors on which depends all the action of the machine, are called valvelets.
You remember those important valvelets, on which depends so much of the mechanism; which permit the blood to pass in one direction, but will not allow it to return back in the other? well, the little doors of the veins, which are also called valvelets, do exactly the same work.
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