BCSE Practice Exam 2025 – Complete Study Resource

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How many pairs of true ribs are there in the human rib cage?

5 pairs

7 pairs

In the human rib cage, there are a total of 12 pairs of ribs, classified into different categories based on their anatomical features. Among these, the true ribs are defined as the first 7 pairs of ribs. True ribs are connected directly to the sternum through their costal cartilages. This direct connection is what distinguishes them from false ribs, which either indirectly connect to the sternum or do not connect at all.

The true ribs help form the protective cage around the thoracic cavity, facilitating respiratory mechanics and protecting vital organs such as the heart and lungs. Each of the first seven pairs attaches directly to the sternum, allowing for more rigidity and stability in this area of the body.

Understanding the structure and classification of the ribs is essential for grasping how the rib cage supports respiratory function and protects internal organs.

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10 pairs

12 pairs

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