Changes

::'''Anterior Neural Crest''' forms; sensory neurones and [[PNS Structure - Anatomy & Physiology#Schwann Cells|schwann cells]]; [[Bones and Cartilage - Anatomy & Physiology|bones]] of the head; dermis of the face; and [[Bones and Cartilage - Anatomy & Physiology|cartilage]].

::'''Anterior Neural Crest''' forms; sensory neurones and [[PNS Structure - Anatomy & Physiology#Schwann Cells|schwann cells]]; [[Bones and Cartilage - Anatomy & Physiology|bones]] of the head; dermis of the face; and [[Bones and Cartilage - Anatomy & Physiology|cartilage]].

::'''Trunk Neural Crest''' forms; sensory neurones of the somatic and autonomic nervous systems (ANS); sympathetic motor neurones of the ANS; melanocytes.

::'''Trunk Neural Crest''' forms; sensory neurones of the somatic and autonomic nervous systems (ANS); sympathetic motor neurones of the ANS; melanocytes.

::'''Posterior Neural Crest''' forms parasympathetic motor neurones of the [[Alimentary - Anatomy & Physiology#Small Intestine|gut]], which control peristalsis.

::'''Posterior Neural Crest''' forms parasympathetic motor neurones of the [[Alimentary System Overview - Anatomy & Physiology#Small Intestine|gut]], which control peristalsis.

==Ectodermal Placodes==

==Ectodermal Placodes==