How many total SETS of ribs are located in the human skeleton?
12
13
5
The Correct Answer and Explanation is :
The correct answer is 12 sets of ribs in the human skeleton.
Explanation:
The human rib cage consists of 12 pairs of ribs, making a total of 24 individual ribs. These ribs are categorized into three groups based on their attachment to the sternum (breastbone) and their overall structure:
- True Ribs (Ribs 1–7):
- These ribs are called “true ribs” because each of them is directly attached to the sternum via their own costal cartilage. This direct connection provides structural support and protection for the organs within the thoracic cavity, such as the heart and lungs.
- False Ribs (Ribs 8–10):
- These ribs are called “false ribs” because they do not have a direct attachment to the sternum. Instead, the costal cartilage of these ribs connects to the cartilage of the rib above them. Although they are still connected to the rib cage, their attachment to the sternum is indirect.
- Floating Ribs (Ribs 11–12):
- These ribs are called “floating ribs” because they do not have any attachment to the sternum or to the costal cartilage of other ribs. Instead, they are only attached to the vertebrae in the back, leaving the front ends “floating.” These ribs provide protection to the kidneys but have less structural importance than other ribs.
The rib cage serves several critical functions: it protects vital organs (such as the heart and lungs), aids in respiration by expanding and contracting as we breathe, and provides structural support for the upper body.
In summary, humans have 12 sets of ribs, totaling 24 ribs, which can be categorized into true, false, and floating ribs based on their attachment to the sternum. These ribs are crucial for protection and respiratory function.