2007-08-26 08:22:09 · 3 answers · asked by Anonymous in Health ➔ Diseases & Conditions ➔ Heart Diseases
Collateral circulations are of many types in normal human being e.g knee joint, mesentric, elbow joint, palm, pineal body, and many others.
I am restricting my answer to your word normal.
The above responders are equally correct.
2007-08-26 09:43:26 · answer #1 · answered by Dr.Qutub 7 · 1⤊ 0⤋
Collateral circulation is additional circulatory vessels, arteries, arterioles, or capillaries supplying some part of the body. They are not really "normal". They are extra, and can be beneficial.
They can be stimulated to grow from blockages in blood vessels, or long cardio type exercise in both the active muscles and in the heart. Collaterals can also form in cancerous tumors and help them to grow.
2007-08-26 08:30:29 · answer #2 · answered by Laurence W 6 · 0⤊ 0⤋
For more details about collateral circulation see:
http://www.americanheart.org/presenter.jhtml?identifier=4583
2007-08-26 08:46:09 · answer #3 · answered by wry humor 5 · 0⤊ 0⤋