Two pulmonary veins emerge from the hilus of each lung, and each pulmonary vein receives blood from 3-4 bronchial veins apiece before draining into the left atrium. The pulmonary veins are fixed to the pericardium travel alongside the pulmonary arteries.unction. While veins usually carry deoxygenated blood from tissues back to the heart, in this case, pulmonary veins are among the few veins that carry oxygenated blood instead. Oxygenated blood from the lungs is circulated back to the heart through the pulmonary veins that drain into the left atrium.
Concept of Operations (CONOP) Concept of operations (CONOP) is a document describing what a system does in easily understood language allowing those without a technical background to know what it is and how it functions.
Full Definition of OPERATION. 1. : performance of a practical work or of something involving the practical application of principles or processes.