THORAX ABDOMEN AND PELVIS

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. 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-2: -The first five ribs are termed true ribs because they attach directly to the sternum through the costal cartilage. The next five ribs are termed false ribs because they attach to the sternum indirectly through the costal cartilage.

Detailed explanation-3: -The first seven sets of ribs are called true ribs. Costal cartilage anchors them to the edge of the sternum, or breastbone, in the middle of the chest at the front of the body. These ribs attach to the thoracic vertebra of the spinal column in the back. Ribs 8–10 are known as false ribs.

Detailed explanation-4: -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.