The purposes of arteries are all these EXCEPT ___.     carry blood from left ventricle to the systemic circulation     carry blood from arterioles to capillaries     carry blood from right ventricle to lungs     assist the heart by elastically expanding then returning to original size with each pulse

10. Using the figure on the right to aid your understanding of double circulation, place the events of a mammalian blood circulation in order from 1-9. _1_ Blood returns from body via the vena cava to right atrium Low pressure/ low O2 Blood flows to left atrium Heart Blood is pumped into right ventricle Right L Right atrium ventricle Blood flows through body tissue capillaries releasing oxygen Left Left atrium r ventricle Blood is routed to the body via the aorta Blood flows into the pulmonary vein Blood is pumped into the pulmonary artery Blood is pumped into the left ventricle Blood flows through lung capillaries to pick up oxygen Pulmonary circulation Lungs co2 High O2 pressure/ high O2 Systemic circulation Veins Arteries Body tissues co2 02 (b) Double circulation in crocodiles, birds, and mammals

Data Analysis and Conclusions 1. Why are the walls of the left ventricle thicker than the walls of the right ventricle? 2. Pulmonary circulation carries blood between the heart and the lungs. Systemic circulation carries blood to the rest of the body. In what chambers of the heart does pulmonary circulation begin and end? In what chambers does systemic circulation begin and end?

Blood returning to the heart from the digestive organs detours to the hepatic sinusoids via the___?   Caudal vena cava External jugular vein Hepatic vein Hepatic portal vein