Development of the nervous system in humans optical vesicle (which will eventually become the optic nerve, retina and iris) forms at the basal plate of the prosencephalon. In the fifth week, the alar plate of the prosencephalon expands to form the cerebral hemispheres (the telencephalon). The basal plate becomes the diencephalon. The diencephalon, mesencephalon and rhombencephalon constitute the brain stem of the embryo. It continues to flex at the mesencephalon. The rhombencephalon folds posteriorly, which causes its alar plate to flare and form the fourth ventricle of the brain. The pons and the cerebellum form in the upper part of the rhombencephalon, whilst the medulla oblongata forms
If We Are the Body not showing them there is a way?" "If We Are the Body" challenges the church to welcome outsiders and to "get more visibly involved in changing this world". "If We Are the Body" received positive reviews from music critics. Kim Jones of About.com noted it as a "highlight" from "Casting Crowns". Andy Argyrakis of "CCM Magazine" said that the song "commands attention" of lead singer Mark Hall. Belinda S. Ayers of Christian Broadcasting Network described it as "powerful" and "catchy". Steve Best of "Cross Rhythms" felt it was an example of Casting Crowns being "more... than rock bluster". Russ Breimeier