What are the essentials of the Christian faith? Answer: The Bible itself reveals what is important and essential to the Christian faith. These essentials are the deity of Christ, salvation by Godâs grace and not by works, salvation through Jesus Christ alone, the resurrection of Christ, the Gospel, monotheism and the Holy Trinity.
Freebase(0.00 / 0 votes)Rate this definition: Crenulation. Crenulation or Crenulation cleavage is a texture formed in metamorphic rocks such as phyllite, schist and some gneiss by two or more stress directions resulting in superimposed foliations.
Gastrulation is a phase early in the embryonic development of most animals, during which the single-layered blastula is reorganized into a trilaminar (three-layered) structure known as the gastrula. These three germ layers are known as the ectoderm, mesoderm, and endoderm.ollowing gastrulation, cells in the body are either organized into sheets of connected cells (as in epithelia), or as a mesh of isolated cells, such as mesenchyme.