316 LABORATORY MANUAL OF HUMAN ANATOMY 



(e) Tip of tongue (apex linguae). 



(f) Mucous membrane of tongue (tunica mucosa linguae). 



This has already been studied in connection with the 

 mouth cavity, but should now be reviewed. 



(fa) Frenuluni ("bridle" or "check-rein") of tongue (frenulum 



linguae). 



(fb) Lingual papillae (papillae linguales). 



(fba) Filiform papillae (papillae filiformes). 



(fbb) Conical papillae (papillae conicae). 



(fbc) Fungiform papillae (papillae fungiformes). 



(fbd) Lenticular papillae (papillae lenticular -e s) . 



(fbe) Vallate papillae (papillae vallatae) (0. T. cireum- 



vallate). 



(fbf) Foliate papillae (papillae foliatae). 



(g) Median sulcus of tongue (sulcus medianus linguae), 

 (h) Terminal sulcus (sulcus terminalis) . 



FIG. 138. 



M. verticalis linguae 

 M. transversus linguae 



Fascia linguae 



-*-M. longitudinalis 

 superior 



Glandula lingualis 



anterior (Blandini, 



Nuhni) 



Plica fimbriata 



Facies inferior linguae Septum linguae 



Transverse section through the tongue near the tip. (After Toldt, Anat. Atlas, Wien, 1900, 



2 AufL, p. 405, Fig. 652. 



(t) Blind foramen of tongue (foramen caecum linguae [Morgagnii]). 

 (ia) Lingual duct (ductus lingualis). 



(iaa) Thyreoglossal duct (ductus thyreoglossus). 

 (j) Lingual tonsil (tonsilla lingualis). 



(ja) Lingual folliculi (folliculi linguales). 

 (k) Muscles of tongue. 



Remove the tunica mucosa linguae from the right side of the 

 tongue; isolate the individual muscles and review their form, posi- 

 tion, origin, insertion, action, and innervation. 

 Extrinsic muscles (vide Fig. 112) : 



(ka) Genioglossus muscle (M. genioglossus). 

 (kb) Hyoglossus muscle (M. hyoglossus). 

 (kc) Chondroglossus muscle (M. chondroglossus). 

 (kd) Styloglossus muscle (M. styloglossus) . 

 Intrinsic muscles (vide Fig. 138) : 



(ke) Superior longitudinal muscle of tongue (M. longitudinalis 



superior linguae) (0. T. superficial lingual). 



(kf) Inferior longitudinal muscle of tongue (M. longitudinalis in- 

 ferior linguae) (0. T. inferior lingual). 



