Which of the following adapts the aorta to the high pressure of blood from the heart?

Explanation

The aorta is the largest artery in the body. It carries blood directly from the left ventricle of the heart, so it receives blood at very high pressure. To handle this, the aorta has thick elastic walls that can stretch and spring back with each heartbeat.

When the heart pumps blood into the aorta, the elastic walls expand to absorb the force. Between heartbeats, the walls recoil (spring back), which helps push the blood forward smoothly. This stretching and recoiling keeps blood flowing even when the heart is relaxing.

Rigid walls would not be able to stretch and could crack or burst under pressure. Membranes are thin layers that would be too weak. A narrow lumen (the space inside the vessel) would actually increase resistance and make it harder for blood to flow. The thick elastic wall is the feature that allows the aorta to withstand and manage the high pressure from the heart.