All are one body.

...all the members of the body, though many, are one body, so it is with Christ.  For by one spirit we were all baptized into one body--slaves and free--and all were made to drink of one Spirit.

For the body does consist of one member but of many.  If the foot should say, "Because I am not a hand, I do not belong to the body" that would not make it any less a part of the body.  And if the ear should say, "because I am not an eye, I do not belong to the body" that would not make it any less a part of the body.

If the whole body were an eye, where would be the hearing?  If the whole body were an ear, where would be the sense of smell?  

But as it is, God arranged the organs in the body, each one of them, as he chose.

-1 Corinthians 12:12-18.