Egyptian culture was the first to produce leavened bread, and leavened bread was a symbol of Egyptian culture. This did not mean that unleavened bread disappeared from the Egyptian diet (when Jews â or others â said, âOn all nights we eat leavened and unleavened bread,â they meant what they said), but leavened bread was preferred.
The ribcage, also called the thoracic cage, is a bony structure made up of the rib bones and their connective tissues. The ribcage forms part of the bodyâs respiratory system.
The bones have a hollow shaft down the middle which consists of a substance called bone marrow, which is basically an important energy source for our body. One of the main functions of the skeletal system is to provide a framework to our bodies, without which we would be a heap of skin, organs, blood vessels etc. The main skeletal system is divided into two parts: The Axial Skeleton. This part consists of 80 bones.