APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -In humans there are normally 12 pairs of ribs. The first seven pairs are attached directly to the sternum by costal cartilages and are called true ribs.

Detailed explanation-2: -There are seven pairs of true ribs. They are the most superior of the thoracic ribs. They are sometimes called vertebrosternal ribs. They differ from false and floating ribs because they directly articulate with the sternum by means of their costal cartilages.

Detailed explanation-3: -The upper seven pairs of ribs are known as true ribs because their costal cartilages articulate anteriorly directly with the sternum. The lower five pairs of ribs (ribs eight to twelve) are known as false ribs because their costal cartilages do not articulate directly with the sternum.

Detailed explanation-4: -According to their attachment to the sternum, the ribs are classified into three groups: true, false, and floating ribs. The true ribs are the ribs that directly articulate with the sternum with their costal cartilages; they are the first seven ribs.

Detailed explanation-5: -Complete answer: The first seven pairs or sets of ribs are known as true ribs. They are called so because it has an attachment to both dorsal and ventral sides. Dorsally it is connected to the vertebrae and ventrally they are connected to the breast bone or the sternum.