ANATOMY

Detailed explanation-1: -The last two false ribs (11–12) are also called floating ribs (vertebral ribs). These are short ribs that do not attach to the sternum at all. Instead, their small costal cartilages terminate within the musculature of the lateral abdominal wall.

Detailed explanation-2: -Each thoracic vertebra articulates with a pair of ribs. Each rib end articulates with demifacets above and below the discs to form synovial costovertebral joints as well as the thoracic transverse processes to form costotransverse joints.

Detailed explanation-3: -The 8th, 9th, and 10th pairs-false ribs-do not join the sternum directly but are connected to the 7th rib by cartilage.

Detailed explanation-4: -The last false ribs (11–12) are also called floating (vertebral) ribs, because these ribs do not attach to the sternum at all. Instead, the ribs and their small costal cartilages terminate within the muscles of the lateral abdominal wall.

Detailed explanation-5: -The sternum is not attached to the last two pairs of ribs at the bottom of the rib cage. These ribs are known as “floating ribs” because their only attachment is at the rear of the rib cage, where they are connected to the spine’s vertebrae. Floating ribs are the 11th and 12th pairs of ribs.