What body system(s) do 3D printers usually benefit or act upon?

Bioprinting, an offshoot of 3D printing, is advancing so rapidly that ... Two legal scholars argue patients and manufacturers would benefit from clearer rules. ... of joining materials, usually layer upon layer, to make objects from data ... it is now a widely recognized manufacturing system that is used across a ...

Explanation:

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a.) carbohydrates

i believe

lifetime activities are certain actions that are either required throughout your life or you choose to do them. for example, eating is considered a lifetime activity, drinking water or other beverages, keeping your body clean, taking medicine. those types of actions are considered lifetime activities.