What is the main difference between pulmonary and systemic circulation?

Question

anonymous · Answer

pulmonary : low resistance (low pressures, up to 25 mmhg)
systemic: high resistance up to 120 normally, and as per hypertension - much more.

systemic: arteries carry oxygenated blood from the heart and veins deoxygenated blood to the heart.
pulmonary - vice versa. arteries carry deoxygenated blood.

a little bit for "advanced users":
the right ventricle (Which pumps blood to the pulmonary flow) receives its blood supply both in systole and diastole. the left ventricle (the "systemic" ventricle) only in diastole.

anonymous · Answer

The main difference is the pulmonary circulation is within the lungs and the veins and arteries leading to the lungs/ heart.  Pulmonary circulation is backwards from the systemic, in that the veins carry the oxygenated blood, and the arteries the deoxigenated blood.