the area of the square is: 100
the area of the circle is: 78.5
i THINK if you subtract it, it will be 21.5
Answer:
Calcitonin stimulates the kidneys to absorb calcium when calcium levels are too low, while parathyroid hormone stimulates the kidneys to excrete calcium when calcium levels are too high.
Explanation:
Plant relies on the sun and we relie on the plants
I believe the answer is stem cell. Hope this helps! <3