A text-book of physiology . Chap, iv.] THE VASCULAR MECHANISM. 329 existing tonic constriction of the blood vessels of the ear, thoughthe effect of section is not so constant or striking as that ofstimulation. § 167. We must now turn to another case. In dealing withdigestion we shall have to study the submaxillary salivary may for the present simply say that this is a glandular masswell supplied with blood vessels, and possessing a double nervoussupply. On the one hand it receives fibres from the cervicalsympathetic, Fig. 74 v. sym. (in the dog, in which the effects whichwe are about
A text-book of physiology . Chap, iv.] THE VASCULAR MECHANISM. 329 existing tonic constriction of the blood vessels of the ear, thoughthe effect of section is not so constant or striking as that ofstimulation. § 167. We must now turn to another case. In dealing withdigestion we shall have to study the submaxillary salivary may for the present simply say that this is a glandular masswell supplied with blood vessels, and possessing a double nervoussupply. On the one hand it receives fibres from the cervicalsympathetic, Fig. 74 v. sym. (in the dog, in which the effects whichwe are about to describe are best seen, the vagus and cervical. Fig. 74. Diagrammatic Representation of the Submaxillary Gland ofTHE Dog with its Nerve and Blood Vessels. (The dissection has been made on an animal lying on its back, but since all theparts shewn in the figure cannot be seen from any one point of view, the figure doesnot give the exact anatomical relations of the several structures.) sm. g\d. The submaxillary gland, into the duct (sm. d) of which a cannula hasbeen tied. The sublingual gland and duct are not shewn. , The lingualbranch of the fifth nerve, the part n. I. is going to tlie tongue, ch. t., ch. t., ch. chorda tympani The part ck. t. is proceeding from tlie facial nerve ; at ch. becomes conjoined with the lingual ?( / and afterwards diverging passes as ch. tlie gland along the duct; the continuation of the nerve in company with thelingual n. I. is not shewn, sm. (jl. Tlie submaxillary ganglion with its severalroots, a. car. The carotid artery, two small liranches of wliicli, a. sm. a. and r. sm
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