What part of the needle is the slanted portion that exposes the opening?

The bevel is the slanted portion of the needle that creates a sharp point and exposes the opening. This design allows for easier penetration into the skin or other surfaces, minimizing discomfort for the patient. The angled cut at the tip of the bevel creates a sharp point that aids in creating a clean entry into the tissue, which is crucial for procedures that require precise delivery of medications or other solutions. The bevel also helps in letting medications flow smoothly through the needle by minimizing resistance as the fluid exits the opening. Understanding the function and structure of the bevel is essential in sterile compounding and administration practices, as it impacts both the efficacy and the comfort of injections.