اسأل وأجب في Biology - الأحياء لغات
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إجابة
Sternum is a flat bone located at the midline of chest and it is also called as breast bone. It protects the internal organs such as heart, lungs and oesophagus from any kind of injuries.
In human body there are 24 ribs which are split into pairs. Pairs 1-5 are attached directly to the sternum through the costal cartilage, pairs 6-10 are attach indirectly and 11- 12 are floating ribs which are...عرض
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