1 Corinthians 12:15, 18-20

The foot might say, “Because I am not a hand, I am not part of the body.” But saying this would not stop the foot from being a part of the body.

If each part of the body were the same part, there would be no body. But truly God put all the parts, each one of them, in the body as he wanted them. So then there are many parts, but only one body.