the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The system is responsible for the flow of blood, nutrients, oxygen and other gases ...

Doppler echocardiographic studies in the human fetuses have focused on the cardiac output and the distribution of blood flow to the pulmonary and systemic circulation in physiologic conditions (6 ...

It opens due to a build-up of pressure in the right atrium, and prevents back flow ... is called systemic circulation. Oxygenated blood is carried to the heart from the lungs in the pulmonary ...