MEDICAL PHYSIOLOGY

Detailed explanation-1: -The trachea’s posterior wall contains a smooth muscle called the trachealis muscle. Adjacent and directly posterior to the trachea is the esophagus.

Detailed explanation-2: -The esophagus lies posterior to the trachea and the heart and passes through the mediastinum and the hiatus, an opening in the diaphragm, in its descent from the thoracic to the abdominal cavity. The esophagus has no serosal layer; tissue around the esophagus is called adventitia.

Detailed explanation-3: -The esophagus is a collapsible muscular tube that serves as a passageway between the pharynx and stomach. As it descends, it is posterior to the trachea and anterior to the vertebral column.

Detailed explanation-4: -The trachea lies anterior to the esophagus and is connected to it by a loose connective tissue. Posteriorly, it is related to prevertebral muscles and prevertebral fascia covering the bodies of sixth and seventh cervical vertebra.