The importance being that the blood cells could not parachute through the small capillaries.

Vascular endothelial cells line the entire circulatory system, from the heart to the smallest capillaries.

Vapour pressure within the wood falls as water is successively contained in smaller capillaries.

These emboli are likely to totally block the small capillaries that supply the intestines.

White blood cells may also bind to the endothelium of small capillaries, obstructing them and leading to more ischemia.

It is too big to move into the small capillaries, and it dies on contact with air.

The microfilariae are released into the host's bloodstream, which carries them to the small capillaries of the skin in the head region.

Moffat wanted the Gangers to appear like "eyeball matter": white with small capillaries running through them.

Petechial hemorrhages- the increased blood pressure ruptures small capillaries in the eyes.

Aside from the small capillaries, burst in the vacuum of space before freezing, the flesh appears normal.