40 miles
Capillaries cover a total of 1,000 square miles
25,000 to 60,000 miles!
a couple of miles long
It depends on how big your body is. The larger you are the more blood vessels you have to supply the tissue. It is estimated that an extra 200 miles of blood vessels develop for each extra pound of fat.
60,000 miles, or the equivalent of 2½ times around the world!
Like 40,893 miles
From ventricle to ventricle, there are more than 50 miles worth of capillaries in which the heart pumps blood around the body.(edt) The various sources I consulted were rather vague on the subject, but I've seen estimates around 60,000 miles (or 100,000 km) in children, and 100,000 miles (161,000 km) in adults for the total length of blood vessels in general. True, this includes arteries and veins also, but most of that length would still be capillaries. Therefore it should be way more than 50 miles...
About 1,506 miles (or as an extra fact, 2,424 kilometers)
They would stretch around the world two and a half times, which equals...several tens of thousands of miles.
12 miles
50.4 miles away.
The capillaries are where the actual transfer of oxygen to the cells happen making it the absolute essential part of the system. The lungs/gills/skin whole job is to get oxygen into the bloodstream so that the capillaries have oxygen to transfer to the cells. The hearts whole job is to supply enough pressure to circulate the blood past the capillaries so it constantly has new oxygenated blood to transfer oxygen to the cells. --Ryan F