The circulatory system is a network consisting of blood, blood vessels, and the heart. This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products. The circulatory system consists of four major components:
The heart keeps the circulatory system running with its consistent pumping. The arteries carry oxygen-rich blood away from the heart and where it needs to go, whereas the veins carry deoxygenated blood to the lungs where they receve oxygen. 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. The circulatory system works due to the constant pressure from the heart and valves throughout the body. The pressue created ensures that veins carry blood to the heart and arteries transport the blood away from the heart. There are also three different types of circulation that occur regularly in the body:
Pulmonary circulation is the part of the cycle carries oxygen-depleted blood away from the heart, to the lungs, and back to the heart. Systemic circulation is the part of the cycle that carries oxygenated blood away from the heart and to other parts of the body. Coronary circulation is the part of the cycle that provides the heart with oxygenated blood so it can function properly.
Here are all of the main organ systems of the human body and some info about them: