The Circulatory system
The Circulatory System is responsible for transporting materials throughout the entire body. It transports nutrients, water, and oxygen to your body cells and carries away waste. The three major parts are The Heart, The Blood, The Blood Vessels.
The Circulatory system works closely with other systems in our bodies. It supplies oxygen and nutrients to our bodies by working with the respiratory system.The organs in the digestive system need the circulatory system to continue to digest food.
The heart beats around 3 billion times in a person's life.
About 8 million blood cells die every second.
It takes around 20 seconds for a red blood cell to circle your body.
Blood that is good quality in oxygen appears red. Blood that is not that good quality in oxygen appears blue.
Your thumb is the size of a artery.