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The pouches lining the inside of the developing throat between the pharyngeal arches, which form several important head and neck structures.
Pouches: 1 makes the middle ear and auditory tube; 2 the palatine tonsil; 3 the inferior parathyroid and thymus; 4 the superior parathyroid; failure gives DiGeorge.
Pharyngeal Arches
Six numbered embryonic arches of the head and neck; the fifth is rudimentary or absent, so the clinically important arches are 1, 2, 3, 4 and 6, each with its own nerve, cartilage, artery and muscles.
Triangles of the Neck
Sternocleidomastoid divides each side of the neck into an anterior and a posterior triangle, each further subdivided.
The Tongue
A muscular organ of taste, speech and swallowing, split by a V-shaped groove into an oral and a pharyngeal part with different nerve supplies.
The Larynx
The organ of voice in the neck, a framework of cartilages that guards the airway during swallowing and produces sound by vibrating the vocal folds.
The Palatine Tonsil
A pair of lymphoid masses in the side walls of the throat that help defend against inhaled and swallowed germs, forming part of a protective ring.
The Bony Orbit
The cone-shaped bony socket that holds and protects the eyeball, formed by several skull bones.