Galen: On the Natural Faculties by Galen
Chapter XIV
57 words | Chapter 44
The superficial arteries, when they dilate, draw in air
from the atmosphere, and the deeper ones a fine,
vaporous blood from the veins and heart. Lighter matter
such as air will always be drawn in preference to
heavier; this is why the arteries in the food-canal draw
in practically none of the nutrient matter contained in
it.
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