Arkansas Esthetician Practice Exam

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What makes up the thorax?

  1. Spine, sternum, and rubes

  2. Spine and ribs only

  3. Sternum and clavicles only

  4. Spine, sternum, and ribs

The correct answer is: Spine, sternum, and ribs

The thorax, commonly referred to as the chest, is primarily made up of three components: the spine, sternum, and ribs. This structure forms a protective cavity for vital organs such as the heart and lungs, serving both a supportive and functional role in the human body. The spine—composed of vertebrae—provides structural support and helps form the back of the thoracic cavity. The sternum, also known as the breastbone, connects to the ribs and plays an essential role in the anatomy of the chest by forming the front part of the thorax. The ribs, which curve around the sides, further protect the organs and provide the necessary structure to facilitate breathing. Together, these elements create a framework that is crucial for both protection and respiration.

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