Image Courtesy www.innerbody.com
One must not have pondered over why our chest is secured by a round cage of ribs. It could have been in a square or rectangle form. Had it been so, men and women would have faced innumerable obstacles, and the life would have gone miserable. Each time there would be a danger of collision with the cage of another person it would have resulted in wounds and cracks in the ribs-, creating additional damages to other parts of the body too.
Hence, its Allah (swt) Who has wisely framed our bodies. The cage of the chest is always round instead of being rectangular or square.