Biology

The sarcomere is the region of a myofibril between two successive

Sudden and involuntary contractions of one or more muscles is 

If the bone ends penetrate the skin and form a wound, the fracture is called

The muscle fibre contains many nuclei, a large number of  mitichondria and is surrounded by a membrane, called

In skeletal muscle, calcium  facilitates contraction by binding  to 

Fusion of vertebral -joints leading to immobility is called