| A | B |
|---|
| lumen | hollow cavity inside the needle |
| cutting edge of needle | bevel |
| hub | point of attachment of needle |
| needle length | cannula |
| barrell | clear plastic or glass that has calibrated scales on it. The inside of the barrell is sterile. |
| movable portion inside of barrel. The rubber portion and the shaft are sterile | plunger |
| Portion of syringe where needle attaches. This part is also sterile. | needle adapter |
| general length of needle | tip of the point to the junction of the shaft and hub. |
