Background. 1  Composed of cells, tissues, organs, organ systems. 2  All cells use ATP for reactions. 3  Four primary types of tissue: epithelial, connective, muscle, and nervous.  Organs have at least two or more types of 1  tissue. Organ systems:
Advocacy Law and Legal Definition Advocacy is the act of pleading for or arguing in favor of something or actively supporting a cause or proposal. It can also refer to the work or profession of an advocate. For lawyers advocacy
Legal Definition of advocacy. 1  1 : the profession or work of an advocate. 2  2 : the action of advocating, pleading for, or supporting a cause or proposal a consequence of his moving advocacy â W. O. Douglas.