A - Vessels serving the head and upper limbs
B - Vessels serving the body trunk and lower limbs
C - Vessels serving the viscera
D - Pulmonary Circulation
E - Pulmonary "Pump"
F - Systemic "Pump"
Step-by-step explanation:
Please find the labelled diagram attached with the post.
From the right atrium through the tricuspid valve to the right ventricle through the pulmonary semilunar valve to the pulmonary trunk to the right and left pulmonary arteries, to the capillary beds of the lungs, to the pulmonary veins, to the left atrium of the heart through the bicuspid (mitral) valve, to the left ventricle through the aortic semilunar valve, to the aorta, to the systemic arteries, to the capillaries of the body tissues, to the systemic veins, to the superior vena cava and inferior vena cava, which enter the right atrium of the heart.