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). Skull foramina. [image] Available at: https://upload.wikimedia.org/wikipedia/commons/0/00/Schädelbasis1.jpg [Accessed 1 Oct. 2018].

Pocket Dentistry. (2018). CLINICAL FEATURES OF FIRST AND SECOND BRANCHIAL ARCH SYNDROMES. [online] Available at: https://pocketdentistry.com/clinical-features-of-first-and-second-branchial-arch-syndromes/ [Accessed 1 Oct. 2018].

Mobile.abc.net.au. (2018). Tonsil surgery might put kids at greater risk of chest bugs, study says - ABC News (Australian Broadcasting Corporation). [online] Available at: http://mobile.abc.net.au/news/2018-06-08/tonsil-surgery-might-put-kids-at-greater-risk-of-chest-bugs/9846394?pfmredir=sm [Accessed 1 Oct. 2018].

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