The Glossopharyngeal nerve supplies the posterior pa of the tongue because it develops from the
D i.e. Hypobranchial eminence- Tongue muscles originate from myoblast of occipital somitesQ. Thus tongue musculature is innervated by hypoglossal nerve.- Glossopharyngeal (9th) nerve supplies posterior (1/3) pa of tongue because it develops from hypobrachial eminence (copula)Q.Parathyroid glands develop from 4th (superior) & 3rd (inferior para thyroid glands) pharyngeal endodermal pouchQ.
Hyoid arch
Tuberculum impar
Mandibular arch
Hypobranchial eminence