SKELETAL SYSTEM - It’s made up by bones. Their job is to give a structure to our body and protect internal organs., MUSCULAR SYSTEM - It’s made up by muscles. This system works with the skeletal system. It allows us to make movements. (walking, eating, moving other organs, for example the heart ot the lungs)., RESPIRATORY SYSTEM - The lungs retain oxygen from air and transport it to the blood. Then lungs get rid of carbon-dioxide., DIGESTIVE SYSTEM - This system brakes down the food we eat to retain minerals.,

SYSTEMS IN THE HUMAN BODY 3

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