**6.2 Oral cavity and tongue**

It is worthwhile to mention that the rhesus monkey possesses a pair of cheek pouches [12]. The tongue plays a pivotal role in digestion and vocalization. The muscles that are responsible for the lingual movements are discussed in section 5.4. The dorsal mucosa of the tongue presents several types of papillae. Gustatory papillae

#### **Figure 42.**

*Ventral view of the upper jaw (A) and dorsal view of the lower jaw (B) with the teeth unilaterally present. I1: dens incisivus primus, I2: dens incisivus secundus, C: dens caninus, P2: dens premolaris secundus, P3: dens premolaris tertius, M1: dens molaris primus, M2: dens molaris secundus, M3: dens molaris tertius.*

#### **Figure 43.**

*Dentition of the rhesus monkey. Upper panel: teeth of the right upper jaw after extraction. Lower panel: teeth of the right lower jaw after extraction. Notice the clear distinction between the crowns and roots, and the number of roots.* *Anatomy of the Rhesus Monkey (*Macaca mulatta*): The Essentials for the Biomedical Researcher DOI: http://dx.doi.org/10.5772/intechopen.99067*

include the fungiform, circumvallate and foliate papillae. The filiform papillae are of the mechanical type (**Figure 44**).
