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
Different contexts in which advocacy is used: 1  In a legal/law context: An 'advocate' is the title of a specific person who is authorized/appointed (in some way) to speak on behalf of a person in a legal process.2  See advocate.ifferent contexts in which advocacy is used: 1  In a legal/law context: An 'advocate' is the title of a specific person who is authorized/appointed (in some way) to speak on behalf of a person in a legal process. 2  See advocate.