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A___________plane divides the body into superior and inferior regions.

 Osteocytes are mature bone cells that occupy the ________in compact bone.     

The glenoid cavity of the _______________ articulates with the head of the _____________.

Loss of muscle mass from lack of activity is termed________________. 

There are ____ lumbar vertebrae, ___cervical vertebrae & ____thoracic vertebrae.                

Which of the following shows the correct order of response of a neuron after being stimulated?

The triads of a muscle fiber consist of ________________________________: 

A single row of tall narrow epithelial cells is called__________

What is the structure called at the end of the red arrow?

These are all organelles that contain membranes EXCEPT: