All of our body parts have a special meaning. Without a single part, all of our body parts will not work functionally. Kinda like unity.
But if you say so, the important parts of the human body is(random):
1.Heart
2.Muscles
3.Bones
4.Lungs
5.Brain
6.Kidneys
7.Stomach
8.Intestines
9.Mouth
10.Eyes
:D
