Factors that disqualification someone for Priestly functions?

This is kind of interesting on what will disqualify someone for the Priestly function around and in the Temple.  I know that Leviticus 21 gives the following that that are required to be a Priest in service: 

·      No man who has any defect may come near

·      No man who is blind

·      No man who is lame

·      No man who is disfigured

·      No man who is deformed

·      No man with a crippled foot

·      No man with a crippled hand

·      No man with who is hunchbacked

·      No man with who is dwarfed

·      No man with any eye defect

·      No man with festering or running sores

·      No man with damaged testicles

·      No man who is not a descendant of Aaron

·      No man who is a Gentile

·      No man who is of the other tribes of Israel

This list makes it very selective on which man can be an active Priest in the Temple.  We find that only Aaron and his sons will serve as priests and the rest of the Levi’s will serve as helpers in the Temple.

Blessing

Stephen

(Lev 21:17-20 NIV)  "Say to Aaron: 'For the generations to come none of your descendants who has a defect may come near to offer the food of his God. {18} No man who has any defect may come near: no man who is blind or lame, disfigured or deformed; {19} no man with a crippled foot or hand, {20} or who is hunchbacked or dwarfed, or who has any eye defect, or who has festering or running sores or damaged testicles.

(Num 3:6-7 NIV)  "Bring the tribe of Levi and present them to Aaron the priest to assist him. {7} They are to perform duties for him and for the whole community at the Tent of Meeting by doing the work of the tabernacle.

(Num 3:10 NIV)  Appoint Aaron and his sons to serve as priests; anyone else who approaches the sanctuary must be put to death."