题目内容

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

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

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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

______ are the additional types of bones that are not included in classification by shapes.

A. sutural bones
B. wormian bones
C. sesamoid bones
D. collar bones