题目内容

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

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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

The following statements , _____, illustrate the functions of calcium.

A. nerve cells need calcium for nerve impulse conduction
B. muscle needs calcium to contract
C. blood needs calcium to clot
D. bone needs calcium to make itself hard

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