Which of the following structures define the boundaries of the thorax? A) Heart and lungs B) T1 vertebra, rib 1, and manubrium C) R & L pleural cavities D) Diaphragm and costal mar... Which of the following structures define the boundaries of the thorax? A) Heart and lungs B) T1 vertebra, rib 1, and manubrium C) R & L pleural cavities D) Diaphragm and costal margin
Understand the Problem
The question is asking which structures delineate the boundaries of the thorax, offering multiple options to choose from. Each option represents a different anatomical structure associated with the thoracic cavity.
Answer
T1 vertebra, rib 1, and manubrium.
The structure that defines the boundaries of the thorax is T1 vertebra, rib 1, and manubrium.
Answer for screen readers
The structure that defines the boundaries of the thorax is T1 vertebra, rib 1, and manubrium.
More Information
The superior boundary of the thorax, also known as the thoracic inlet or aperture, is made up of the T1 vertebra, the first pair of ribs, and the manubrium of the sternum.
Sources
- The Thorax - med.uc.edu
- 1. ANATOMICAL BASIS OF THORACIC SURGERY - cpd.partners.org
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