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RCULATION T, SPECIAL REGIONS —, , Apart from the pulmonary ors, also possesses the following cire, , Hepatic Portal Syste:, , It is the type of portal system, which, all vertebrates. It is a unique, between the digestive tract and live, portal vein, carries blood fror, (hepatic gland). The liver finally 9, cava through its own vein (ie,, delivering it to the systemic circule, , which consists of two hypophysica, carry blood from the hypothalamu:, lobe of pituitary gland. ih, , Coronary Circulation, , Although the heart is always filled, take its oxygen and nutrient supp!, in its chamber. Thus, in order, nutrients to the muscles of the h, present. t, , , , Lungs, , , , Pulmonary artery, , Vena cava —__, (great veins) +], , Smooth, muscle’ «, Capill ret, ap i, , Fig, 18.4 Schematic plan of blood cite, , The right and left coronary arteries, ascending aorta which supply oxygenate, heart muscles, The coronary veins bri, , blood to coronary sinus. Thus, carri, atrium,