All the following are formed elements of the blood except erythrocytes throbocytes plasma leukocytes 3.
Arteries have all three tunica layers and sphincter muscles to regulate blood flow.
True False 4. To withstand blood hydrostatic pressure, the aorta has a tough outer covering of connective tissue called tunica media artery membrane tunica adventitia dura mater 5. The first artery off the aorta is the pulmonary artery ascending aorta coronary artery descending aorta 6. Pulmonary circulation differs from systemic circulation in that blood leaves from a ventricle lood travels through veins and arteries the work is done at the capillary level veins carry oxygenated blood 7. The second capillary bed in the liver is called the hepatic portal vein hepatic artery sinusoids microvilli 8.