PIRA 2C30.35 - Artery, Vein, and Capillaries Model
Photo Shows the Apparatus Used at U.T. Austin
- Demonstrates the anatomy and physics of veins (blue), arteries (red), and capillaries
(purple). Each piece has parts labeled with a number, designated in the key. A copy of the
key is included above.
- There is a gradient of flow lines of blood moving at different velocities at different
locations within the blood vessels, which is characterized by laminar flow. This is due to
wall stress, where the blood flowing closest to the wall has to fight against friction, which
decreases the velocity. The flow becomes turbulent in areas where vessels branch off or
change in diameter, which requires more energy to move the blood.
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