The humerus is the only bone of the skeleton of the arm (thoracic stylopodium).
It is composed by three basic segments:
The proximal extremity, articulating with the scapula and bearing the head and the major and lesser tubercles
The body (shaft) bearing the deltoid tuberosity
The distal extremity bearing the humeral condyle and articulating with the radius and ulna
Text by Antoine Micheau, MD - Copyright IMAIOS Veterinary Anatomy of Domestic Mammals: Textbook and Colour Atlas, Sixth Edition - Horst Erich König, Hans-Georg Liebich - Schattauer - ISBN-13: 978-3794528332