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Science Revision (Healthy (circulatory system (this is the system that…

- - - - Arteries, Veins and Capillaries
        
        Heart belongs to this.
        
        The arteries are the main blood vessels in the body as they are the biggest in the body they take big loads of blood from the heart and pass it on to the veins. If the arteries are cut the blood will spray everywhere as there is very high pressure in the arteries.
        
        The veins are the blood vessels that you can see as they aren't as big as arteries and don't have as much pressure in them and carry less blood.
        
        The capillaries are the tiny blood vessels that carry the blood all over the body to the little places like toes and fingers
        
        The diffusion is where the oxygen passes from the lungs to the heart so the blood can carry it round the body.
    - - The heart has 4 valves: The mitral valve and tricuspid valve, which control blood flow from the atria to the ventricles.
    - - The atrium is the upper chamber in which blood enters the heart.
    - - A ventricle is one of two large chambers toward the bottom of the heart that collect and expel blood received from an atrium