Run the capillary and blood pressure simulators, find out why radius rules blood flow, and trace a drop of blood through the body. Nothing here is graded.
Fluid (water)Plasma protein (albumin)Lymphatic capillaryNet filtration (out)Net reabsorption (in)
Mean arterial pressureHeart rateArteriole diameterBlood volumeSympathetic signalRenin / angiotensin
Real rule: flow ∝ radius⁴If flow just followed radius (not real)Red blood cells
0:00Click the next vessel on the map, or use the vessel buttons beside or below it.