28min - The doctors reveal what makes you flexible as they test the incredible strength of a tendon to the max, and they find out what it's like to be an air ambulance pilot.
28min - The doctors reveal how your eardrum works to enable you to hear, and they find out how tough it is to be hospital radio hosts.
28min - The doctors reveal how important cartilage is to your body with the help of a suit of armour, and they find out what it takes to be a hospital porter.
28min - The doctors reveal why a body cannot survive without oxygen for more than three minutes, and they find out what it is like to be 999 call handlers.
28min - The doctors reveal how amazing your saliva is, and they find out why the hospital's maintenance team work with birds of prey.
28min - The doctors reveal the special cells in your eyes which help you see, and they find out what it takes to be a hospital entertainer.
28min - The doctors reveal the amazing army of germ fighters that make up your immune system, and they find out just how difficult it is to clean a baby's incubator.
28min - The doctors find out why we burp and film Dr Xand burping from the inside. They also get behind the wheel to discover what it takes to be a good ambulance driver.
28min - The doctors reveal the job your pancreas does to keep your blood sugar levels in check, and they find out what it's like to be the hospital postman.
28min - The doctors reveal the strength of your jaw, and they see if they can take the heat when they try their hands at being hospital ward chefs.
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