The heart is a part of the ____________________________ system., respiratory, digestive, circulatory, excretory, The intestines are part of the __________________________ system., respiratory, digestive, circulatory, excretory, The lungs are part of the ______________________________ system., respiratory, digestive, circulatory, excretory, The kidneys are a part of the ___________________________ system., respiratoy, digestive, circulatory, excretory, When we breathe, the air enters our body through our _____________________________-., ears, nose and mouth, eyes, hands, After we breathe in, the air pass through a tube called the ___________________________., trachea, lungs, kidneys, intestines, The most important organs of the respiratory system are the _________________________., trachea, lungs, heart, stomach, To live, we need to breathe in ________________________. , carbon dioxide, nitrogen, methane, oxygen, The digestive system is responsible for ________________________., breathing, digestion, excretion, blood circulation, Out digestive system helps our bodies obtain energy from ______________________________., food, hamburgers, sushi, pizza, Our digestive system is responsible for extracting ____________________________ from our foods., oxygen, water, nutrients, atoms, Nutrients are transported around our body via our _________________________ system., respiratory, digestive, circulatory, excretory, The circulatory system is responisible for carrying nutrients and _____________________ all over the body., carbon dioxide, oxygen, methane, nitrogen, The circulatory system also eliminates waste through the kidneys in the form of ____________________________., carbon dioxide, oxygen, feces, urine, It also eliminates _________________________ through the lungs., urine, oxygen, carbon dioxide, feces, The circulatory system does many other things as well (more than one answer)..., regulates body temperature, transports hormones, involved with the immune system, excretes excrement, The excretory system eliminates __________________________., blood, carbon dioxide, waste (desechos), urine, The kidneys create ____________________________., urine, waste (desechos), blood, oxygen, There are two tubes that bring the urine from the kidneys to the ___________________________., lungs, heart, trachea, bladder, The body also gets rid of waste through the _____________________________., lungs, skin, trachea, bladder.

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