Canadian Red Cross Emergency Medical Responder Practice Exam

A strain is defined as an injury that occurs when a muscle or tendon is overstretched or torn. Tendons connect muscles to bones, and they can sustain injuries similar to those that occur in muscles themselves, which is why the term "strain" is specifically related to this type of tissue.

In the context of your question, choosing the option that specifies tendon fibers aligns perfectly with the biological function and structure associated with strains. This understanding is crucial, particularly in emergency medical response scenarios, as it helps responders accurately assess and communicate injuries to medical professionals.

The other options do not fit the definition of a strain as closely. Ligaments are connective tissues that connect bones to other bones and are associated with sprains, not strains. Cartilaginous tissue serves as a cushion between bones and is not involved in muscle injuries. Osteopathic fibers relate to bone structures, which are not relevant when discussing strains that specifically involve muscle and tendon tissues.