How does the FDA define "tissue"?

The definition of "tissue" by the FDA is centered around the concept of human cells and tissues that are intended for transplantation. This definition is broad and encompasses various types of human biological materials that can be used to restore, replace, or enhance the functions of damaged or diseased tissues in recipients.

This understanding is crucial for the regulation and oversight of tissue banking and transplantation practices, ensuring that the materials are safe, effective, and suitable for their intended use. By focusing specifically on tissues intended for transplantation, the FDA delineates its regulatory scope and priorities, which is vital for maintaining public health and safety.

The other options fall short of the correct definition provided by the FDA. For instance, focusing on human cells used for research purposes does not encompass the full range of applications that tissue can have in transplantation. Similarly, defining tissue as cells or tissues derived from animals or solely human organs kept for storage does not align with the FDA's specific focus on human tissues intended for transplantation.