What does "arthr-" specifically denote in medicine?

"Arthr-" is a prefix used in medical terminology that specifically denotes a joint. This prefix is derived from the Greek word "arthron," which means joint. In various medical terms, "arthr-" is commonly used to refer to conditions, structures, and procedures related to joints. For example, arthritis refers to inflammation of the joints, and arthroscopy is a procedure that allows for the examination and treatment of joint problems using a small camera.

The other choices represent distinctly different anatomical elements. The term for muscle is "myo-," tissue is commonly referred to as "tiss-" or related terms, and "ven-" denotes vein. Each of these prefixes and root words has its own specific meanings and applications in medical vocabulary, clearly distinguishing them from the focus of "arthr-."