Order the Components of the Circulatory SystemOnline version In this game, players must correctly order the components of the circulatory system based on their size, from the largest to the smallest. by Alicia Del Valle Santos 1 The pulmonary circuit ends when oxygenated blood returns to the left atrium via the pulmonary veins Systemic circulation begins when the oxygenated blood is pumped through the aorta to the organs. Deoxygenated blood enters the right atrium through the vena cavae. The blood absorbs carbon dioxide from the body, and The blood flows into the left ventricle. Systemic circulation ends when deoxygenated blood reenters the heart at the right atrium. The blood collects oxygen and releases carbon dioxide. It then passes to the right ventricle, which pumps it to the lungs through the pulmonary artery.
