help with bone homework for zoology?

[Ashley]

A 75-year-old woman and her 9-year-old granddaughter were victims of a train crash. In both cases, trauma to the chest was sustained. X rays of the grandmother revealed several fractured ribs, but her granddaughter had none. Explain these different findings.

[oikos]

My guess is that the answer you are looking for is that the old woman has osteoporosis and the girl's bones were still a trifle flexible.

[sunita s]

i think you need a little more info such as which way the train fell... and so forth... if it was the exact same way, i would say that the daughters bones are probably much stronger than the gmas and they are also smaller so the impact could be sustained easier.