Atlas of Human Anatomy in Cross Section: Section 2. Neck, Shoulders, Upper Arm, and Upper Thorax (Lungs)
Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul
C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed
Upper Left Quadrant
Lower Left Quadrant
1. Brachiocephalic v., right
17. Radial nerve
This section passes through the aorta (78) and its three primary arterial branches: right brachiocephalic trunk (86) and left common carotid (83) and left subclavian (80) arteries. The trachea (85) is seen next to a dilated or open esophagus (82). The section cuts the sixth thoracic vertebra (43).
The esophagus is the first segment of the alimentary canal and extends from the pharynx to the stomach. The esophagus may be divided into three segments: cervical, thoracic, and abdominal. The esophagus in the cervical and abdominal regions is generally closed, but the thoracic (as seen here) is more or less open, containing air.
Several bronchopulmonary segments can be recognized: left lung, upper lobe and division, anterior (79) and apical posterior (57) segments, and right lung, upper lobe, posterior (19), apical (4), and anterior (3) segments.
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