The cranial nerves are those that are linked to the brain. Most of these nerves leave the region called the brainstem.
The olfactory nerve is exclusively sensitive and is related to the conduction of olfactory impulses, ie our ability to perceive smells. The terminations of this nerve are located in the nasal mucosa, it is also possible to see filaments of this nerve in some regions.
The structure that forms cranial nerve I is the olfactory nerves while forming the 2nd is the optic nerve. Together with retina and olfactory epithelium, all of them are considered part of the Central Nervous System — wherein they synapse directly to the brain without the aid of any ganglia.
The infant lungs and central nervous system are proceeding to develop during the third trimester that is about 34 week. The skin has grown soft and delicate, and she's stretching out and growing also rounder.
