An example of a period on the geologic time column is:

An example of a time unit is:

This unit comes before “Paleogene”

This unit comes after “Ordovician”

Atoms with unique atomic weights are called:

abduction is movement in the frontal plane, away from the body

The pectoralis major

What bone am I?  I lie between the scaphoid and the triquetrum.

The purpose of the rotator cuff is to depress the humeral head as you raise your arm, in order to clear the acromium.

Flexion/extension movement occur in which plane?