Mediastinum Louis P. Dehner I. GROSS ANATOMY. The mediastinum is located in the thoracic cavity and is generally divided into superior, anterior, middle, and posterior compartments and is bounded by…

Lung Jon H. Ritter Hannah R. Krigman I. NORMAL ANATOMY. The lung is defined by airway branching, first into right and left lobes, then segments, and finally, the functional unit…

The Ear Peter A. Humphrey Rebecca D. Chernock I. NORMAL ANATOMY. The ear is composed of the external ear, the middle ear, and the inner ear. The external ear is…

Salivary Glands Joshua I. Warrick Elise L. Krejci James S. Lewis Jr. I. NORMAL ANATOMY A. Macroscopic/gross. The salivary glands are exocrine organs that secrete components of saliva to both…

Tumors and Cysts of the Jaws David E. Spence Samir K. El-Mofty I. NORMAL ANATOMY. Of all the bones of the skeleton, the jaws are uniquely distinguished by harboring the…

Nasal Cavity, Paranasal Sinuses, and Nasopharynx Heather N. Wright James S. Lewis Jr. I. NORMAL ANATOMY A. Nasal cavity. The normal sinonasal region consists of the central nasal cavity, paired…

Oral Cavity and Oropharynx Rebecca D. Chernock James S. Lewis Jr. I. NORMAL ANATOMY A. Oral cavity. The anterior aspect of the oral cavity extends from the mucocutaneous junction (vermilion…