A membrane in the midline of the THORAX of mammals. It separates the lungs between the STERNUM in front and the VERTEBRAL COLUMN behind. It also surrounds the HEART, TRACHEA, ESOPHAGUS, THYMUS, and LYMPH NODES.
D004240
Diverticulum
A pouch or sac developed from a tubular or saccular organ, such as the GASTROINTESTINAL TRACT.
Diverticulosis,Diverticula
D004936
Diverticulum, Esophageal
Saccular protrusion beyond the wall of the ESOPHAGUS.