The medical term meaning pertaining to the neck and arms is "cervicobrachial."
Ciliary means pertaining to cilia, hairlike structures in the body.
The medical term meaning pertaining to the direction of the tailbone is "caudal." This term is used to describe structures that are situated closer to the tailbone or tail end of the body in anatomical orientation.
The medical term for pertaining to two joints is "bilateral." This term indicates that the condition or structure being described relates to both sides of the body or a pair of joints.
The immune system comprises the body's defenses.
The medical term you are looking for is "epithelial." It refers to anything related to or characteristic of epithelium, which is a type of tissue that lines the surfaces and cavities of the body.
Muscular means pertaining to muscle.MuscularMuscular (Muscul = ref to muscle + ar = pertaining to) is an adjective, so it has to have something to modify, such as muscular body, intramuscular injection, muscular contraction, etc.Did you know that the Latin "musculus" which we generally interpret as "muscle" literally means "little mouse"? The same reference is found in the Greek "mys" which means both "mouse" and "muscle". Apparently some of the muscles, in contraction, looked like a mouse body or reacted like a mouse would.
The medical terminology combining form -alis generally refers to "pertaining to." It is commonly used to indicate a relationship or connection to a specific body part or system.
MedialMedio = middle-al = pertaining toMedial = pertaing to the middleMedial
Posterior (Back)Anterior (Front)term means pertaining to the back and to the front
Throughout the body or body part, when talking about health. If talking about medical coding, it has a completely different meaning that I'm not qualified to explain well.
The medical term is neuromuscular. This term refers to anything involving the relationship between nerves and muscles in the body.