Answer: The liver.. :
Your liver is your body's largest solid organ. On average, it weighs around 3 pounds in adulthood and is roughly the size of a football. This organ is vital to the body's metabolic functions and immune system. Without a functioning liver, a person cannot survive.
Explanation: Pretty cool if you ask me.
Answer:
A heart is a cardiac muscle.
Explanation:
It pumps blood through the body.
Physical activity and Protein intake.
The answer is D the last option hope this helps
