circulatory system

• the circulatory system is a system of blood vessels with a pump and valves to ensure one way flow of blood.
• circulatory system is described as a double circulatory system
• pulmonary circuit - carries deoxygenated blood from right ventricle to lungs, oxygenates it then returns back to left atrium via pulmonary vein
• systemic circuit - carries oxygenated blood from left ventricle to rest of body, delivers nutrients then returns back to right atrium via vena cava
• the blood is pump at a low pressure circulation from the heart to the lung as it is for a very short distance. the right ventricle wall is thin..

  to prevent damage to the lung tissues and to ensure efficient gas exchange
• the blood is pump at a high pressure circulation from the heart to all part of the body. left ventricle wall is thick

  -to ensure that blood can reach a faster rate to support the high metabolic rate of the body.
• double circulation

  
• Double circulatory system means that blood passes twice through the heart for one complete cycle around the body