1 Electromagnetic coil, formed when a conductor is wound around a core or form to create an inductor or electromagnet.  Ignition coil, an electromagnetic induction coil used in internal combustion engines to create a pulse of high voltage for a spark plug.
systemic circulation the general circulation, carrying oxygenated blood from the left ventricle to the body tissues, and returning venous blood to the right atrium. umbilical circulation fetal circulation through the umbilical vessels. vitelline circulation the circulation through the blood vessels of the yolk sac.
An umbilical granuloma is a small nodule of firm pinkish-red tissue (similar to scar tissue) with persistent yellow-green drainage. This is different from an infection because it is not accompanied by swelling, redness, warmth, tenderness, or a fever.