The ependymal cells line the ventricles of the brain. They compose a thin lining along the brain's ventricle cell, and the central canal of spinal cord. They are a type of glial cells. They play an important role in the production of cerebrospinal fluid.
Trees are green, Trees are autotrophic (they make their own food), Trees release oxygen into the air.
Competition will increased because more organisms will be competing for resources
The only way invertebrates fight diseases is through excretion. Excretion is a process through which metabolic wastes and toxins are eliminated from a specific organism.
