Certified Instrument Specialist (CIS) Practice Exam 2025 – The All-in-One Guide to Achieving Certification Success!

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What does the prefix 'endo' mean?

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The prefix 'endo' originates from the Greek word "endon," which translates to "inside" or "within." In scientific and medical contexts, 'endo-' is commonly used to denote structures or processes occurring within a particular organism, cell, or environment. For example, in anatomy, the term "endocrine" refers to glands that secrete hormones internally, as opposed to "exocrine," which relates to glands that release substances externally. Understanding the meaning of 'endo' helps in deciphering various terms across different fields, particularly in medicine and biology, where it is essential to distinguish between interior and exterior functions or locations.

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