AMCI Introduction to Medical Terminology for I2MC Practice Test 2026 - Free Medical Terminology Practice Questions and Study Guide

In medical terms, direction or flow is often shown by prefixes. The prefix per- means through or by, and that fits perfusion because it describes the flow of a fluid (usually blood) through tissues or organs. So perfusion conveys that movement through the vascular system to reach and nourish tissues. The other prefixes have different senses—trans- means across, inter- means between, and pre- means before—so they don’t match the idea of moving through.