The cardiovascular system works in tandem with the respiratory and nervous systems. It works with the respiratory system by taking the oxygen inhaled into the lungs to the rest of the body, and delivering carbon dioxide from the body to the lungs for expulsion. Impulses from the the sympathetic and parasympathetic nervous systems help regulate the heartbeat. This is governed by proper electrolyte transmission. Calcium, potassium and sodium are examples of principal electrolytes.
Electrolytes help facilitate electrical and ionic activity from nerves to muscles.
Sodium is vital for maintaining fluid balance in body tissues. Repeated electrolyte imbalances can contribute to an eventual weakening of and damage to the heart muscle. The heart is a cone-shaped organ, about the size of a clenched fist. It pumps blood thoughout the body and averages 70 beats per minute in an average adult. This is accomplished via nerve impulses and contractions of muscles.