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 the Body" received positive reviews from music critics, who praised its lyrics and arrangement, and it was nominated for the awards for Song of the Year and Pop/Contemporary Recorded Song of the Year at the 35th GMA Dove Awards. The song spent three weeks at number one on the "Radio & Records" Christian AC and Christian CHR charts and peaked at number three on the "Billboard" Hot Christian Songs and Hot Christian AC charts. According to lead singer Mark Hall, "If We Are the Body" was originally written for use as a "teaching tool" in his youth group. Hall, a