ANSC 2340 Lecture Notes - Nasal Septum, Purkinje Fibers, Qt Interval
10 Apr 2013
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Document Summary
Thoracic cavity thorax or chest cavity (1) 2 pleural cavities (closed space) for lungs. Mediastinum, located between left and right pleura contains pericardial cavity, trachea and esophagus. Bony cavity formed by sternum, ribs, costal cartilage and thoracic vertebrae. Contains trachea, esophagus, lungs, heart, large blood vessels, nerves, lymphatics and lymph nodes. Organs and structures in the thoracic cavity are lined by a thin membrane called pleura. Pleura has two layers visceral (inner, covers lungs and adjoining structures) and parietal (outer, attached to chest wall) Contains pleural fluid which allows pleurae to slide against each other in ventilation. Boundaries of thoracic cavity are dorsally, thoracic cavity laterally, ribs and intercostal muscles and ventrally, sternum. Abdominopelvic cavity abdominal (2) and pelvic cavities (3) 13th rib is used as a landmark to show where thoracic cavity ends and abdominopelvic cavity begins. Heart and blood vessels deliver blood to the bodies tissues. Blood used for transport (nutrients and waste), thermoregulation, immunity and acid-base balance.
