Even if you are alive, some of your cells are dying. The dead cells are then made into hair, fingernail, ETC.
Media Vita In Morte Sumus. The bodies we have are noble and God-created: enfleshed spirit. They are wombs for the soul to be born into heaven, and one day we will return to these bodies, only to find them perfected. And after this our exile, we will come face to face with the first fruit of that womb, and there will be neither tears, nor death, nor mourning, nor crying, nor pain. Requiem Aeternam dona eis, Domine et lux perpetua luceat eis: Requiescant in pace. Amen