Constituent
noun
an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system
“spare components for cars”
Similar: component, element
noun
a member of a constituency; a citizen who is represented in a government by officials for whom he or she votes
“needs continued support by constituents to be re-elected”
noun
something determined in relation to something that includes it
“he wanted to feel a part of something bigger than himself”
Similar: part, portion, component part, component