_T. p._, Tensor palati; _L. p._, levator palati; _Pt. p._,
pterygo-pharyngeus; _P. p._, palato-pharyngeus; _S. p._,
stylo-pharyngeus; _Th. p._, thyro-pharyngeus; _C. p._,
crico-pharyngeus; _Th. h._, thyro-hyoideus; _Hyo. gl._, hyo-glossus;
_G. p._, guttural pouch; _F. p._, foliate papilla; _A. v._, facial
artery and vein. The concealed parts of the hyoid bone are indicated
by dotted line.
]
The =muscular tissue= may be divided into intrinsic and extrinsic. The
intrinsic musculature consists, not of distinct muscles, but rather of
systems of fibers which run longitudinally, vertically, and
transversely, blending with the extrinsic muscles, which are now to be
described.
1. =Stylo-glossus.=—This is a long, thin muscle, which lies on the
lateral part of the tongue. It arises by a thin tendon from the outer
surface of the great cornu of the hyoid bone, near the articulation with
the small cornu. It terminates near the tip of the tongue by blending
with its fellow of the opposite side and with the intrinsic musculature.
The action is to retract the tongue. Unilateral contraction would also
draw the tongue toward the side of the muscle acting.
[Illustration: