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What is a skeleton system? Name any four types of bones based on their shape. |
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Answer» The human body has 206 bones of various shapes and sizes. The bones give shape and firmness to the body, as also it protects the vital organs like brain, heart, lungs and spinal cord. Bones can either be loosely arranged or densely arranged. The loosely arranged bone is called “spongy bone” and densely arranged bone is called “compact bone”. Some bones are hollow from inside and filled with bone marrow. Classification of Bones. Bones can be classified according to their shape as under:- (a) Long Bones. These bones are long and tubular and are confirmed to upper and lower limbs. (b) Short Bones. This bones are short and tubular and are found in the ankle/.wrists (c) Flat Bones. These bones are flat like plates. e.g. Bones of cranium Skull shoulder or hips. (d) Irregular Bones. Irregular or mixed shaped. Eg. Vertebral column. (e) Sesamoid Bones. They develop in the tendons of the muscles around the joints e.g., Patella |
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