I believe it is the nervous system but I'm not 100% sure
Answer:
Some life-threatening issues and diseases caused by an unhealthy heart include: Heart attacks: Blood flow (thus, oxygen) to the heart is partially completely cut off to the heart. Heart attacks are caused by blocked arteries.
Explanation:
Answer:
These six essential nutrients are nitrogen, phosphorus, potassium, magnesium, sulfur and calcium.
Explanation: