Alcoholic hepatitis and cirrhosis are conditions affecting the liver
Answer:
Timing
Explanation:
I am a Junior Olympian in Track and Field.
The cells in the heart need a constant supply of nutrients / oxygen and to get rid of their waste products ans that why it needs its own special circulatory system.
The answer is 20 minutes. You must have 20 minutes of cardio each day to have an effective cardio exercise.
The answer is C. Hopes this helps you out. :)
