Insights:

Each pharyngeal arch (of which there are 5) have a vascular component (aortic arch), innervation (cranial nerve), connective tissue (bone, muscle, cartilage) and sinus (a cleft and a pouch).

Arches 1 and 2 are instrumental in forming structures of the face and middle ear.

Arches 3, 4 and 6 are important in forming structures of the neck and superior mediastinum.

Image credits:

Wikimedia (2018). Aortic arches. [image] Available at: https://upload.wikimedia.org/wikipedia/commons/8/84/Gray473.png [Accessed 1 Oct. 2018].