. Compendium of histology. Histology. 236 TWENTY- THIRD LE CTURE. once computed that our body contains nearly two and a half millions of these convoluted glands. Considerable sudoriparous glands also surround the anus (Gay). In the external auditory canal, these convoluted glands ac- quire a shorter excretory duct, which is no longer convoluted, and their secretion is fatty and brownish-yellow. These are the glandulae ceruminosae. Let us now investigate the submucous follicles, the glandu- lae sebaceae of the older anatomists. Their secretion, an es- sentially fatty, thickish substance, we hav
. Compendium of histology. Histology. 236 TWENTY- THIRD LE CTURE. once computed that our body contains nearly two and a half millions of these convoluted glands. Considerable sudoriparous glands also surround the anus (Gay). In the external auditory canal, these convoluted glands ac- quire a shorter excretory duct, which is no longer convoluted, and their secretion is fatty and brownish-yellow. These are the glandulae ceruminosae. Let us now investigate the submucous follicles, the glandu- lae sebaceae of the older anatomists. Their secretion, an es- sentially fatty, thickish substance, we have already become familiar with in a preceding lecture (p. 132). They form racemose organs (Fig. 191), which are some- times smaller and more simple, sometimes more voluminous and complicated in their structure. They are situated in the corium, and are, for the most part, but by no means unexceptionally, confined to the vicinity oT the hair, into the sac of which (p. 37) they ex- crete the tough, fat substance. We also meet with smaller examples of our organ connected with thick hairs, and larger glands with lanugo hairs. At last these open freely externally, without the intermediation of a hair sac. Their size varies considerably, from to 1 mm. and more. The vesicles differ considerably in dimen- sions and form. Young, striated connective tissue here replaces the so-called membrana pro- pria. Passing now to the gustatory organ, we have again to com- bine what has been previously mentioned. Even at that time (p. 141) we remarked that the posterior portion of the tongue, upwards in the long known papillae circumvallatae, and laterally in the subsequently rediscovered papillae foliatae, contained terminal fibres of the glosso-pharyngeus serving as. Fig. 191.—A sebaceous follicle ; a, the gland vesicle ; b, the excre- tory duct ; c, the sac of a lanugo hair; d, the shaft of the Please note that these images are extracted from scanned page images that may have been di
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