Capillaries have slow flow. This slow speed maximizes opportunities of diffusion of oxygen, nutrients, and wastes.
The flow of lymph is slow because the lymphatic system has no pump.
Slow blood flow in the capillaries helps increase the efficiency of diffusion. The thin capillary wall also helps with diffusion.
Fast
The narrow diameter of capillaries maximizes opportunities for diffusion of oxygen, wastes, and nutrients into and out of the blood from the body tissues. The slow speed of flow also facilitates diffusion.
By the time the blood gets to the capillary bed, the blood pressure has dropped very low. This is important since this allows time for oxygen and nutrients to be dropped off and wastes and carbon dioxide to be picked up. By the way, the capillaries are so small that the red blood cells can barely fit through. They have to bend to fit. That also slows things down.
fast
Fairly slow
It flows slowly.
slow
Microangiopathy, is when the walls of very small blood vessels (capillaries) become so thick and weak that they bleed, leak protein, and slow the flow of blood. It is a common occurrance with diabetics. This can happen in many areas of the body.
fast and slow
Im not sure but I think its not fast but not slow so in the middle