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GCSE PE (Respiratory system (The air enters the body at the mouth or nose,…

- - - - The air then goes to either of the bronchi
        
        after the bronchi the air travels through the bronchioles
        
        the air travels from the bronchioles to the alveoli
        
        At the alveoli gas exchange occurs and oxygen diffuses into the blood
        Carbon dioxide diffuses out of the blood when exhaling
        
        CO2 travels from the alveoli to the bronchioles
        
        CO2 travels from the bronchioles to the bronchi
        
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- - - - irregular bones
        
        long bones
        
        these are the largest bones in the body and act like a lever
        
        protection of vital organs
      - these can hold the body weight
- - - - In the body the oxygenated blood is taken to the muscles to allow respiration to occur
        
        once this has happens the blood becomes
        deoxygenated and is taken to the heart via aorta
        
        The now deoxygenated blood enters the heart at the right atrium
        
        the blood then travels through the tricuspid valve into the right ventricle
        
        The blood the travels to the lungs via the pulmonary artery
        
        this is where the blood is taken to the lungs to absorb oxygen due to the blood containing hoemoglobin
        
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- - - - The blood moves the oxygen as part of the cardiovascular system this allows the blood to travel to the body whilst oxygenated
        
        once the blood passes by the muscular system the oxygenated blood release oxygen then picks up carbon dioxide
        
        It picks up carbon dioxide because the muscles use oxygen to create energy and releases Carbon dioxide as a waste product
        
        the energy that is created is used to allow the muscles to contract and relax which pulls on the bones (skeletal system)
        
        the bones act as a lever and when pulls by the muscles they cause movement