You appear to have trouble with 'hierarchy' of life. It goes something like this: cells make organs, organs make the organism; the human embryo is an organism called a human organism and it is exactly complete at each stage in that human organism's life cycle for that stage in the lifetime; in human organisms, the organism begins at conception and continues to develop for deacdes unless executed or death by 'natural cause'. A cell, beit blood cell or skin cell or heart muscle cell or even gamete, is a subunit of an organ that is in turn a subunit of the organism.
That was too easy. Got any more hangups?