In the thoracic cage, which bone lies directly anterior to the heart?

• A. Sternum
• B. Vertebral column
• C. Clavicle
• D. Scapula

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the anatomical position of the heart within the thoracic cage. The heart is located in the mediastinum, which is the central compartment of the thoracic cavity.
2. Step 2: Identify the bones that form the boundaries of the thoracic cage. These include the vertebral column posteriorly, the ribs laterally, and the sternum anteriorly.
3. Step 3: Recognize that the heart lies posterior to the sternum and anterior to the vertebral column. This means the bone directly in front (anterior) of the heart is the sternum.
4. Step 4: Eliminate other options based on their anatomical positions: the vertebral column is posterior to the heart, the clavicle is superior and lateral, and the scapula is posterior and lateral to the thoracic cage.
5. Step 5: Conclude that the sternum is the bone lying directly anterior to the heart within the thoracic cage.