The answer would be D. variation
Answer:
A 0.9% solution of NaCl (saline) is isotonic to animal cells. When exposing animal tissues to solutions, it is common to use an isotonic solution such as Ringer's buffered saline so as to prevent osmotic effects and consequent damage to cells.
Explanation:
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Tracheotomy refers to creating an opening in the neck in order to place a tube into a person's windpipe.
Answer:
you already answered it I'm confused lol
