Definitions for "Capillaries"
The smallest blood vessels. They permeate the tissues, serving as microscopic extensions of arterioles and venules; through their semipermeable walls, fluids, nutrients, and waste gases are exchanged between the blood and the tissues.
tiny hair-like blood vessels, some of which carry nutrient to the hair growth matrix.
The small blood vessels at which gas and nutrient exchange occurs.
Minute spaces, cracks or pores in rock through which hydrocarbon fluids move in response to natural forces.