By speaking to people about it and asking for help in school.
I know its kidneys but idk the second blank nothing makes sense
Small bean shaped organs called kidneys help clean the blood
Answer:
The answer is age.
Explanation:
So for a 50-year-old, maximum heart rate is 220 minus 50, or 170 beats per minute.At a 50 percent exertion level, your target would be 50 percent of that maximum, or 85 beats per minute.
C) disease -causing organisms