Question

List the number of types of ribs (costa)

Answer 1

There are three types of ribs, also known as "costae," in the human body:

True Ribs (Vertebrosternal Ribs): These are the first seven pairs of ribs that directly articulate with the sternum through their own costal cartilages.

False Ribs (Vertebrochondral Ribs): These are the next three pairs of ribs (8th, 9th, and 10th). They do not directly attach to the sternum but connect to the cartilage of the rib above them, eventually joining the sternum indirectly.

Floating Ribs (Vertebral Ribs): The last two pairs of ribs (11th and 12th) are considered floating ribs. They do not attach to the sternum or the costal cartilages of other ribs and instead are only connected to the vertebrae and associated muscles.

So, in summary, there are 12 pairs of ribs, and they can be classified into true ribs, false ribs, and floating ribs based on their connection to the sternum.

Answer 2

There are three types of ribs: true ribs (1-7) that attach directly to the sternum, false ribs (8-10) that attach indirectly, and floating ribs (11-12) that do not attach to the sternum.

Step-by-step explanation:

The human skeleton includes 12 pairs of curved, flattened bones known as ribs (costae). These ribs are classified into three categories based on their relationship with the sternum. The first group is the true ribs, which include ribs 1-7. Their costal cartilages attach directly to the sternum. The second group is the false ribs, which include ribs 8-12. These ribs either attach indirectly to the sternum or not at all. Ribs 8-10 have their costal cartilages attached to the cartilage of the next higher rib. The third group, known as floating ribs, consists of ribs 11 and 12. These are short ribs that do not connect to the sternum or other ribs, as their costal cartilages terminate within the abdominal wall's musculature.