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.
What the Olympic medals mean... umbilical artery. umbilical artery n. Either of two arteries that before birth is a continuation of the common iliac artery and after birth partly forms the medial umbilical ligament and partly is reduced in size and gives off the superior vesical artery.