THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The labial arteries branch from the facial artery at the region where the vermillion border of the upper lip meets the vermillion border of the lower lip. The superior labial artery traverses between the mucosal and upper part of the orbicularis oris muscle.

Detailed explanation-2: -The facial artery-also called the external maxillary artery-is a primary source of oxygenated blood to the muscles and skin of the face.

Detailed explanation-3: -The blood supply of the external nose is provided primarily by the facial artery, particularly along the lateral aspect and in the lower one-third, with the anterior lateral nasal artery supplying the majority of blood flow to the nasal tip.