They're connected to the vertebrae at the back of the body and are joined via a strip of cartilage to the sternum or breast bone at the front. The next three pairs are known as false ribs because they are connected to another rib at the front of the rib cage instead of directly to ...
In humans, all blood cells originate from hematopoieticstem cells. About95percent of the body's blood cells are produced in thebone marrow. In an adult, most of the bone marrow is concentrated in the breastbone and in thebonesof thespineand pelvis. Several otherorganshelp to regulate the pr...