Circulation in Pulmonary Blood Vessels, Pulmonary Artery as well as Brachial artery and Characteristics and Regulation of Pulmonary Blood Flow

The system of blood vessels known as the pulmonary circulation, as opposed to the systemic circulation between the heart and all other bodily tissues, forms a closed circuit between the heart and the lungs. On the evolutionary cycle, the first animals to develop a three-chambered heart are lungfishes and amphibians, which also exhibit pulmonary circulation. In crocodilians, birds, and mammals, the ventricle is divided into two chambers, creating a four-chambered heart, which completely separates the pulmonary circulation. These forms start the pulmonary circuit with the right ventricle, which pushes blood through the pulmonary artery that has been deoxygenated