Figure 1 (below). Midsagittal section of head showing the nasal cavity (a), with its chonchae (b), inferior boundary of the hard (d) and soft (e) palates, and its posterior opening, the internal naris or choana (c). The pharynx (or throat) is divided into the nasopharynx (f), oropharynx (g), and laryngopharynx (h). The larynx (voicebox) consists of several pieces of cartilage, including the epiglottis (i) and thyroid cartilage (j), containing the false (k) and true (l) vocal folds.