The four bulges in a vertebrate embryo that form the head and throat of the animal. These four arches coordinate with four complicated nerves in the adult animal, and are found to create the same structures in animals as different as fish and humans.
Arches Quotes in Your Inner Fish
The Your Inner Fish quotes below are all either spoken by Arches or refer to Arches. For each quote, you can also see the other terms and themes related to it (each theme is indicated by its own dot and icon, like this one: Note: all page numbers and citation info for the quotes below refer to the Vintage Books edition of Your Inner Fish published in 2009.).
Chapter 5 Quotes
What I've just given you is one of the big tricks for understanding the most complicated cranial nerves and large portions of the head. When you think trigeminal nerve, think first arch. Facial nerve, second arch.
Arches Term Timeline in Your Inner Fish
The timeline below shows where the term Arches appears in Your Inner Fish. The colored dots and icons indicate which themes are associated with that appearance.
Chapter 5: Getting Ahead
Chapter 10: Ears
Chapter 11: The Meaning of It All