femur - The longest bone in the human body, skull - Bone that protects the brain , humerus - A bone also known as your 'funny bone', marrow - Something inside a bone where red and white blood cells are made , support - One of the functions of the skeleton, blood - needed to help give the brain oxygen, lungs - Organ for respiration , liver - This organ shrinks as you get older , stomach - This organ produces acid and enzymes to help break down food, kidneys - An organ the size of a computer mouse, shaped like something you can eat and is just as important as the heart, bladder - Allows storage and excretion of urine, skeleton - structural frame of bones that supports the body,

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