Ad99998 04 012a/eng
Mikroscopische Untersuchungen der Rindszunge
Beschreibungstext eng
Miscellaneous Subjects XXXIV. Vol. IV. No. 10., MICROSCOPIC OBSERVATIONS ON THE TONGUE., The Tongue deserves all our attention, as well from the circumstance of its being the seat of a particular sense, the taste, as from its being a principal instrument of speech, since many letters cannot, without its assistance, be pronounc'd. It is composed of a variety of muscular fibres crossing each other, whence is deriv'd the ease with which it so quickly turns on all sides. Besides these, a number of tender ramifications of nerves, which terminate on the surface in a kind of highly irritable warts, run into the Tongue, and thro' their means we are sensible of taste. These are of three kinds:, 1) rose-leav'd,, 2) of the shape of flax-comb,, 3) mushroom-shap'd., We will now examine them singly both of their natural size, and magnified, as they appear in a boil'd calfs- tongue, as they are thus more remarkable., Fig. 1. A small, boil'd Calfs-tongue of the natural size with its different skins and warts, or papillary, membranes., We here see the different skins of the tongue lying one over the other, with the membranes, or extremities of the nerves. a and b shew the upper skin; at a are seen the roseleav'd extremities of the nerves, or papillary membranes, as they are call'd; at b the flaxcomb-shap'd; c exhibits the second skin lying under this first; d the third skin; e the fourth and finest skin; at f are seen the mushroom-shap'd extremities of the nerves., In Fig. 2, 3 and 4 we see these three different shap'd extremities of the nerves separately., Fig. 2. The rose-leav'd Extremities, or papillary membranes., At A we see one of these extremities of the natural size, as they are seen in Fig. 1 upon the tongue. At B it appears considerably magnified. The name of rose-leav'd is deriv'd from their somewhat resembling a five-leav'd rose., Fig. 3. The flaxcomb form'd Extremities, or papillary membranes., At A is seen a small piece of the tongue cut thro', with the extremities of the nerves which appear upon it, in the shape of a flaxcomb. At B we see them still more plain, as they appear thro' the magnifying glass. Their lengthen'd channels b penetrate the flesh of the tongue, receive at c several small veins, which arise at d out of the lower flesh of the tongue., Fig. 4. The mushroom shap'd Extremities, or papillary membranes., Here appear at A in their natural size, and at B magnified, the mushroom shap'd papillary membranes, taken notice of at f Fig. 1. The little warts, or papillary membranes noted at a a a are plac'd like small buttons on the upper coat of the tongue. At b is the branch of the nerve, which is otherwise enclos'd in the flesh of the tongue, uncover'd, the ramifications of which proceed respectively to the single papillary membranes.
