The interior is lined with endothelial cells called tunica intima. The elastic layer of the tunica intima is a fenestrated membrane. It is characterized by fibrosis of the tunica intima and calcification of the tunica media. The healthy epicardial coronary artery consists of three layers, the tunica intima, media, and adventitia. In an aortic dissection, blood penetrates the intima and enters the media layer. The structure of the tunica intima depends on the blood vessel type. It consists of the three tunics&colon; Tunica media, intima and externa. The stomatedeum and proctodeum are invaginations of the epidermis and are lined with cuticle (intima). As blood flows down the false lumen, it may cause secondary tears in the intima. Germination of cysts is accompanied by changes in the intima, visible with an electron microscope. Leukocytes migrate to the subendothelial space and aggregate within the intima. The car's design was previewed by the Intima concept car shown in October 2007.