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Questions and Answers
The thoracic cage is formed by which of the following structures?
The thoracic cage is formed by which of the following structures?
- Sternum anteriorly, 7 cervical vertebrae posteriorly, and 12 pairs of ribs and costal cartilages on each side
- Clavicle anteriorly, 5 lumbar vertebrae posteriorly, and 10 pairs of ribs and costal cartilages on each side
- Sternum anteriorly, 12 thoracic vertebrae and intervertebral discs posteriorly, and 12 pairs of ribs and costal cartilages on each side (correct)
- Scapula anteriorly, 12 thoracic vertebrae and intervertebral discs posteriorly, and 10 pairs of ribs and costal cartilages on each side
Which blood vessels supply the thoracic cage?
Which blood vessels supply the thoracic cage?
- Coronary arteries from the aortic sinus and pulmonary veins from the pulmonary circulation
- Pulmonary arteries from the pulmonary trunk and azygos veins from the superior vena cava
- Anterior intercostal arteries from the internal thoracic artery and posterior intercostal arteries from the descending thoracic aorta (correct)
- Superior vena cava and inferior vena cava
What is the function of the mediastinum in the thoracic cavity?
What is the function of the mediastinum in the thoracic cavity?
- It is responsible for gas exchange in the lungs
- It supports the structure of the ribcage
- It is a partition between the two pleural cavities (correct)
- It houses the heart, lungs, and major blood vessels
How is the mediastinum divided within the thoracic cavity?
How is the mediastinum divided within the thoracic cavity?
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Where does the venous blood from the thoracic cage drain into?
Where does the venous blood from the thoracic cage drain into?
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