I need a helpful contribution, Ruth felt asleep on the deck and when she woke up she was floating on an old board in the middle of the sea. The sun...

I need a helpful contribution,Ruth felt asleep on the deck and when she woke up she was floating on an old board in the middle of the sea. The sun was hot and she was very thirsty. She wanted to take a long, cool drink of seawater, but something she learned in her recent on-line class stopped her from drinking seawater.

Why shouldn't she drink seawater?

Use terms: hypotonic, hypertonic, isotonic, osmosis, salinity, effect on organs and systems.