Which blood vessel carries de-oxygenated blood and has thick muscular walls?

The pulmonary artery is the blood vessel responsible for carrying deoxygenated blood from the heart to the lungs. Its thick muscular walls are essential for withstanding the pressure generated as it transports blood away from the heart and toward the lungs for oxygenation. This muscular structure provides the necessary support to maintain blood flow and manages the pressure during the transit of blood through the pulmonary circulation.

The choice of the pulmonary artery reflects its unique role in the circulatory system, as it is the only artery that carries deoxygenated blood. In contrast, the other arteries mentioned, such as the coronary artery, aorta, and femoral artery, carry oxygenated blood to various parts of the body. Thus, the pulmonary artery’s specific function and structural characteristics make it the correct answer for this question.