主动脉瓣由三个薄而精细的瓣叶组成。在上方的主动脉上可以看到冠状动脉的开口。光滑的心内膜下面是红棕色的心肌。主动脉瓣上方的血管内膜光滑，不伴有动脉粥样硬化。
The aortic valve shows three thin and delicate cusps. The coronary artery orifices can be seen just above.The endocardium is smooth, beneath which can be seen a red-brown myocardium. The aorta above the valve displays a smooth intima with no atherosclerosis.