ANATOMY IX A NUTSHELL. 



545 



Blood Supply. — Branches from the facial artery. 

 11. Depressor anguli oris (also called Triangularis nienti). 

 Origin. — From the external oblique line of the inferior maxillary bone 

 between the attachments of the Depressor iabii inferioris and Platysma myoides. 

 Insertion. — Into the angle of the mouth. 

 Action. — To draw down the angle of the mouth. 

 Xerve Supply. — Supramaxillarv division of the facial. 

 Blood Supply. — Branches of the facial artery. 



PLATE CCLXXIX. 



AMPULLA OF DUCT 



ACINI OF (HAND 



ADIPOSE LOCULUS 



MAMMILLA 



AREOLA 



GLAND LOCULUS 



The Mammary ( }land. 



12. Levator labii inferioris, also called Levator menti. 



Origin. — From the incisive fossa of the inferior maxillary bone. 

 Insertion. — Into the facial pari of the Orbicularis oris and internment 

 of chin. 



Action.- To raise the lower lip. 



Nerve Supply. — Supramaxillarv branch of the seventh. 



Blood Supply. Branches of the facial artery. 



13. Orbicularis oris which has been described on page 540. 



14. Platysma inyoides. Description. The Platysma myoides, which i^ 

 a broad thin layer of muscle, lies in the superficial fascia. 



Ork;ix. — From the dee]) fascia which covers the Deltoid and Pectoralis 



