A disease caused by a deficiency of Vitamin D and calcium salts in the bone.

The deepest of the abdominal muscles is the _________.

The muscle that extends the forearm is the _________.

The major components of the axial skeleton include _________

Contraction of myofibrils results from _________ cross-bridges pulling _________ myofilaments to the center of a sarcomere.

The pelvic girdle is comprised of _________

There are five _________vertebrae, seven _________vertebrae, and twelve _________vertebrae. 

A _________ contains a somatic motor neuron and all of the muscle cells that it innervates.

The hyoid bone _________

Reduction in muscle fiber size and strength is called