PATHOLOGY

Detailed explanation-1: -Veins are generally larger in diameter, carry more blood volume and have thinner walls in proportion to their lumen. Arteries are smaller, have thicker walls in proportion to their lumen and carry blood under higher pressure than veins.

Detailed explanation-2: -The largest artery in the body is the aorta, which is connected to the heart and extends down into the abdomen (Figure 7.4. 2). The aorta has high-pressure, oxygenated blood pumped directly into it from the left ventricle of the heart.

Detailed explanation-3: -Arteries have smaller lumens than veins, a characteristic that helps to maintain the pressure of blood moving through the system.

Detailed explanation-4: -The superior vena cava measures 24 mm in diameter. The veins that receive venous blood return from the upper portion of the body, above the diaphragm, are short in length. The superior vena cava is the body’s largest vein.