The answer would be fossils since they are they remains of past life forms
The CNS are lined by ependymal cells. Ependymal cells are epithelial cells that monitor the composition of cerebrospinal fluid (CSF)
A solute is a substance that is dissolved in the solvent.
Some examples of a solute are sugar in water, carbon dioxide in water, and sodium chloride in water.
Its a heart rhythm problem that occurs when the heart beats with rapid, erratic electrical impulses. this causes pumping chambers in your heart (the ventricles) to quiver uselessly instead of pumping blood
