| A | B |
|---|
 | barrel |
 | plunger |
| the circumference of a needle | gauge |
| Injection given between layers of the skin, into the dermis. Injections are given at a 5- to 15-degree angle. | intradermal |
| Injections given into muscle tissue. Injections are given at a 90 degree angle. | intramuscular |
| Injection given into the connective tissue, under the dermis. Injections are usually given at an angle of 45 degrees. | subcutaneous |
| Made of glass with a constricted, prescored neck that you snap off to allow access to the medication. | ampule |
| A single-dose or multidose container with a rubber seal at the top. | vial |
| Located in the upper arm just below the acromion process. | deltoid |
| Landmarks for this injection site are the greater trochanter, and the anterior superior iliac crest. | ventrogluteal |
| Landmarks for this injection site are the knee and the greater trochanter. | vastus lateralis |
| Technique for injecting irritating preparations into muscle without tracking residual medication through sensitive tissues. | z-track |
