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Bones are living

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The respiratory is what allows us to breathe in oxygen and breathe out carbon dioxide.

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you can eat thing because you teeth help it brake down

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Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

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you can eat things that can be digestive to the system.

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You could use osmosis to preserve food for a long time

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mechanical digestion is when your teeth grind the food that is in your mouth, Also another example of chemical digestion is where your tongue moves the food around in your mouth.

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our teeth are a mechanical digestion system because it breaks up and tears through the food we eat

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Q 2- why do we have subsystems?

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Can you have a system within a subsystem ?

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How many Subsystems can go into a system ?

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Q 1- is there a lot of systems
Q 2- is the systems big or small

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you need a microscope to see single-celled organisms

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Q 1-  we have a lot of cells in or body
Q 2-  cells are very little

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1.all living things have cells
2.cells are almost everywhere in your body