Final answer:
Retrieved musculoskeletal tissues must be wrapped with at least two moisture barriers to maintain sterility. Chemical barriers in the body help in innate immunity. The correct answer is option a.
Step-by-step explanation:
Retrieved musculoskeletal tissue should be wrapped aseptically with at least two moisture barriers to ensure that it remains sterile and protected from external contaminants such as microorganisms and environmental factors like desiccation and tears. The human body uses various mechanisms as part of the innate immune response, including chemical barriers.
Chemical barriers include substances like lysozymes in tears and acids in the stomach that help to inhibit or destroy pathogens. The skin also provides a physical barrier, whereas the mucous membranes use a combination of physical and chemical barriers to prevent pathogen entry.
Specifically, epithelial tissues utilize a particularly dense suite of tight junctions as an added defense mechanism to prevent microbes from entering the underlying tissue. Microbes are primarily filtered out of the fluids that accumulate in body tissues by the lymphatic system.