How ribs attach to skeleton true and floating ribs?

Ribs are bones that form the rib cage, protecting the heart, lungs, and other organs in the chest cavity. There are twelve pairs of ribs in humans, with each rib attaching to the spine at the back and to the sternum (breastbone) at the front. The ribs are classified into three types based on how they attach to the sternum:

1. True ribs (ribs 1-7): These ribs attach directly to the sternum through their own cartilage. They are the most stable and immobile of the ribs.

2. False ribs (ribs 8-10): These ribs also attach to the sternum, but they do so indirectly through the cartilage of the rib above them. They are less stable and more mobile than the true ribs.

3. Floating ribs (ribs 11-12): These ribs do not attach to the sternum at all. They are the most unstable and mobile of the ribs and only attach to the vertebrae at the back.

Here's a summary of how each type of rib attaches to the skeleton:

- True ribs (ribs 1-7): Each true rib articulates with the thoracic vertebrae and has its own costal cartilage that attaches to the sternum.

- False ribs (ribs 8-10): False ribs are connected to the spine, and their costal cartilages join together forming costal cartilage. This costal cartilage attaches to the sternum, but only indirectly through the costal cartilage of the rib above.

- Floating ribs (ribs 11-12): Floating ribs end freely or attach loosely to the ribs above, they do not reach the sternum or contribute to the formation of the costal margin.