ribs have non-costal cartilage which connects them to the ribs above, and for this they are known as "false ribs". The last two ribs are called "floating ribs" because they do not attach to the sternum or to other ribs and simply "hang free". The length of each rib increases from number one to seven and then decreases until rib pair number 12. The first rib is the shortest, broadest, flattest, and most curved.

Vertebral column

At birth the majority of humans have 33 separate vertebrae. However, during normal development several

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