. The elements of materia medica and therapeutics (Volume 2) . ely : of these, the circular fibres are Alimentary Canal of the Leech, the most external, and the longitudinal ones the most internal.„ The Digestive System consists of a mouth, alimentary tube, l,c,d, e,f,Sg,\ j, ft, J, to, Cells of the anus» salivary glands, and liver. The mouth is placed in thestomach. middle of the oval or buccal disk ; its shape is triradiate,—that n, Cc-ecal sacs. iS) 0f three equidistant lines or rays meeting in a centre. £tt^ Within it are three white sublenticular jaw, (dentiferous tu- merit of (?) the sma
. The elements of materia medica and therapeutics (Volume 2) . ely : of these, the circular fibres are Alimentary Canal of the Leech, the most external, and the longitudinal ones the most internal.„ The Digestive System consists of a mouth, alimentary tube, l,c,d, e,f,Sg,\ j, ft, J, to, Cells of the anus» salivary glands, and liver. The mouth is placed in thestomach. middle of the oval or buccal disk ; its shape is triradiate,—that n, Cc-ecal sacs. iS) 0f three equidistant lines or rays meeting in a centre. £tt^ Within it are three white sublenticular jaw, (dentiferous tu- merit of (?) the small intestine, oercules or piercers), which in appearance are cartilaginous; r. Cecal sac of the last cell of the but Brandt says they consist of a strong firm skin, enclosing amuscular mass. On the free curved sharp margin of each jaware about sixty small, finely-pointed teeth. The oesophagus isa muscular tube, and dilates as it approaches the stomach ; but at its termination it contracts into a small circular aperture, its whole length not exceeding a. stomachs, Large , Rectum. THE BL00D-SUCKI3G LEECHES. 773 quarter of an inch. The stomach occupies two-thirds of the length of the animal, and is dividedinto about eleven compartments or cells, each of which, from the second to the eleventh, givesoff on each side a cacal sac, those of the lftst cell being the largest, and extending down bythe side of the intestine as fur as the commencement of the rectum. The stomach consists ofthree coats,—a cellular, a muscular, and a mucous one. Its eleventh cell terminates by a fun-nel-shaped projection in the intestine. The intestine is about an inch in length, at its upperorifice is a valve, and at its lower end a sphincter: on either side of it, for the greater part ofits length, is one of the sacs for the last compartment of the stomach; on its inner surface areseveral folds. It is divided into small and large intestine, the lower part of the latter beingcalled a rectum
Size: 955px × 2616px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, bookid, booksubjectmateriamedica
