A surgeon can use lumbar puncture to withdraw cerebrospinal fluid from subarachnoid space in the lumbar region of the spinal cord  

Radioactivity—process of spontaneous atomic decay.

Myosin heads attach to actin to form a               

Which of the following is not classified as connective tissue

Wernicke area  

Skeletal muscle   composed of bundles of muscle fibers called

Enzymes are found in the

The largest internal cellular organelle is known as the _______ and is the cells control center

This system distributes hormones, nutrients, gases and picks up waste from all over the body

All of the following organs are part of the digestive system EXCEPT