Animal cells always burst in hypotonic condition. (Conc. in the cell is more than Conc. outside cell)
Osmosis: Water will flow from solution with lower concentration to solution with higher concentration.
Therefore, osmosis makes water to flow from outside into the cell. Unlike plant cells, animal cells don't have cell walls, so they can't tolerate higher internal pressure, and finally burst. Hypotonic plant cells are turgid, which is its healthy state.
(The best condition of animal cell is isotonic condition)
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