Tiny Blood Vessels Are Called?

Answer

The tiny blood vessels in our bodies are called coronary collaterals. They act effectively as a natural heart by-pass. Coronary collaterals are practically imperceptible until activated when they enlarge to carry major amounts of blood.
Q&A Related to "Tiny Blood Vessels Are Called?"
Capillaries.
http://wiki.answers.com/Q/What_are_tiny_blood_vess...
Size Capillaries are very small, thin and fragile. In some cases, they are only one cell thick, so only one cell can pass through them at a time. Connection to Arteries The arteries
http://www.ehow.com/how_5619825_tiny-blood-vessels...
Broken blood vessels can lead to bruises or blood spots, such as petechiae or purpura. Bruises typically look like black-and-blue welts, while blood spots are red or purple discolorations
http://www.ehow.com/facts_6374498_causes-blood-ves...
Capillaries . The smallest of the blood vessels: capillaries.
http://wiki.answers.com/Q/What_are_the_tiny_blood_...
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