The lips consist of an upper lip (labium superius) and a lower lip (labium inferius). The lips merge at the right and left corner of the mouth (angulus oris). They contain muscle tissue and the oral fissure (Rima oris) forms the entrance to the oral cavity. On the inside, they have an upper and lower … Lip
Blood supply The lips are very well supplied with blood. The arterial blood flow comes from the facial artery, an outlet from the external carotid artery. The carotid artery branches out again into an upper superior labial artery and a lower inferior labial artery to supply the lips. The venous outflow into the jugular vein … Blood supply | Lip
Labial frenulum The labial frenulum is called frenulum labii in the technical language and is located on the inside of the upper lip. It is located in the middle of the upper incisors. It is a connective tissue structure, but it does not perform any important function. The labial frenulum is merely a remnant. A … Labial frenulum | Lip
