If the concentration of water is the same inside and out the cells, then there is no net movement of water into or out of the cell. The cells remain in their normal state.
If the water concentration is too high outside of the cell then water enters the cell by osmosis. If too much water enters, the cell will burst. <u>If the water concentration is too low outside compared to the inside of the cells, water leaves the cells by osmosis. This causes cells to shrivel.</u>
Meninges- three layers of connective tissue 1) Dura Mater: tough top layer 2) Arachnoid Mater: middle; collagen/elastic fibers; spiderweb effect 3) Pia Mater: delicate and thin; bottom transparent layer made up of elastic/collagen fibers; blood vessels