"A part" is very different from "Apart in many ways. If we look at a part meaning, it is a unit of something that is composed and that can be divided. A part can be equal to another part of the original parent. It may also refer to Living organisms such as Organs, Hair, Hands, etc. It is also used to indicate possession of a part by someone by Using a possessive noun before "part", such as: "His part of homework was done by me too" Sometimes, a part may also be referring to some role in acting. In many instances, the word "A" can be dropped from the word "A Part", and the meaning of the word will remain the same since "A" is just there to make the pronunciation easier when people read it or talk to other people.