Nerve cells 

1.Every human body contains billions of nerve cells.

2.There are around 100 billion nerve cells in just your brain.

3.Nerve cells are the smallest nerve in the nervous system.

4.Some people think the nerve cell looks like a tree.

5.The nerve cells in your body  are as small as 0.1 millimeter long .

 

Bone cells 

 

1.The bone cell in Greek bone is osteo. 

2.Bone cells are 15 micrometers long .

3.Steoblasts, osteoclasts, osteocytes, and osteoprogenitor

 are the four types of bone cells in the human body.

4.Bone cells are types of cells in your bone.