Blood Cardiovascular System

The rats online game. The circulatory system consists of four major components:. The Heart: About the size of two adult hands held together, the heart rests near the center of the chest. Thanks to consistent pumping, the heart keeps the circulatory system working at all times.

Arteries: Arteries carry oxygen-rich blood away from the heart and where it needs to go. Veins: Veins carry deoxygenated blood to the lungs where they receive oxygen. Blood: Blood is the transport media of nearly everything within the body. It transports hormones, nutrients, oxygen, antibodies, and other important things needed to keep the body healthy.Oxygen enters the bloodstream through tiny membranes in the lungs that absorb oxygen as it is inhaled. As the body uses the oxygen and processes nutrients, it creates carbon dioxide, which your lungs expel as you exhale. A similar process occurs with the digestive system to transport nutrients, as well as hormones in the endocrine system. These hormones are taken from where they are produced to the organs they affect.The circulatory system works thanks to constant pressure from the heart and valves throughout the body.

Your heart has four valves that keep your blood moving in the correct direction by opening only one way and only when they need to.

This pressure ensures that veins carry blood to the heart and arteries transport it away from the heart. (Hint: to remember which one does which, remember that that “artery” and “away” both begin with the letter A.).