supplies blood to the anterior (front) parts of the scalp, ear, face, neck, and side of the head. Facial artery external maxillary artery supplies blood to the lower region of the face, mouth, and nose.
Axle bushing is an independent plain bearing that is inserted into a housing to provide a bearing surface for rotary applications; this is the most common form of a plain bearing.[8] Common designs include solid (sleeve and flanged), split, and clenched bushings.
In most QD type bushings, a setscrew in the flange tightens against the key to prevent key loss in applications subject to vibrating or pulsating loads, and in vertical shaft applications. Some bushing types are manufactured with an integral key that is formed as part of the bore. This also prevents potential key loss.