Saline solutions have the same or close to the same amount of salt as our blood does, so we get the amount of salt needed for our bodies. During blood loss, you lose the salt you need, so they're basically adding it back in with the saline solution, making your electrolyte balance go back to normal level. It also gives us the right amount of water to keep us hydrated.
Matrix are within the inner membrane of the mitochondria.
Answer:
In a comparison of birds and mammals, the condition of having four limbs is a shared ancestral character
