Deltoid
Biceps or triceps
injections are normally given in the deltoid muscle which attaches to itself to the scapula and acromion
arm
B12 injections can cause discomfort due to the needle's penetration into the muscle tissue, which may trigger a brief pain response. Additionally, the viscosity of the B12 solution can contribute to a feeling of pressure during the injection. Typically, B12 injections are administered intramuscularly in areas such as the deltoid muscle of the arm or the gluteal muscle in the buttocks.
The bicep is the front part of your arm. The tricep is the muscle in the back part of the arm.
The muscles in your arms are bicep or tricep. Your Bicep muscle is the above part of your arm and your Tricep muscle is the under part of your arm. So tricep
Arm
It is a triangular muscle covering the shoulder joint, it raises the arm from the side of the body
Biceps brachii muscle, is a muscle located on the inside of the upper arm Biceps femoris muscle, is one of the hamstring muscles at the back of each thigh
Injections, in general, are taken through many places in the human body. They could be taken under the skin, in the veins, or in the muscles or called intramuscular. Taking injections through the butt is considered as a type of an intramuscular injection. This type of injection could be take through the muscles of the arm but they are preferred to be taken through the butt because the muscle of the butt is huge and can better tolerate the injection and its effects preventig many disadvantages of injections taken through the muscles of the arm.
No, an appendage is a part of the body like an arm or a leg. A muscle is a group of tissues that works together to preform a function.