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.
The 2 umbilical arteries are continuous with the internal iliac arteries and carry deoxygenated blood from the fetus to the placenta. The most common abnormality of the umbilical cord is a single umbilical artery (SUA), which occurs in 0.5% to 2.5% of pregnancies. This finding is sometimes referred to as a 2-vessel cord. The loss of 1 umbilical artery likely occurs secondary to thrombotic atrophy of a previously normal artery.