题目内容

when it comes to the protection of skeletal system, which are the following statements CORRECT?

A. cranial bones protect the brain
B. vertebrae protects the spinal cord
C. sternum protects the heart and lungs
D. pelvis protects the internal reproductive organs

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_ and _ are principal minerals that are stored in bones.

A. manganese
B. calcium
C. phosphorus
D. magnesium

On the basis of shape, almost all the bones may be classified into four main types: ___, _, _, and ___.

A. long
B. short
C. irregular
D. flat

Examples of flat bones include _____.

A. sternum
B. ribs
C. cranial bones
D. scapulae

Irregular bones are bones of _____.

A. vertebrae
B. face
C. thorax
D. pelvis