. A manual of elementary zoology . Zoology. 48 MANUAL OF ELEMENTARY ZOOLOGY bladder, and dorsally the ducts of the kidneys and in the female those which bear the eggs. Besides numerous small glands in the mucous membrane, the alimentary canal receives the secretions of two large glands, the liver and the pancreas. The liver is a large, reddish-brown structure in the forepart of the belly. It consists of a right and a left lobe and a small'median lobe Fig. 24.—A longitudinal median section through the head of a frog. Taq., Aquaeductus cerebri; , anterior choroid plex
. A manual of elementary zoology . Zoology. 48 MANUAL OF ELEMENTARY ZOOLOGY bladder, and dorsally the ducts of the kidneys and in the female those which bear the eggs. Besides numerous small glands in the mucous membrane, the alimentary canal receives the secretions of two large glands, the liver and the pancreas. The liver is a large, reddish-brown structure in the forepart of the belly. It consists of a right and a left lobe and a small'median lobe Fig. 24.—A longitudinal median section through the head of a frog. Taq., Aquaeductus cerebri; , anterior choroid plexus; br., bronchus; , central canal of spinal cord ; cb., cerebellum ; , left cerebral hemisphere ; , nostril; Eu., Eustachian tube ;,/*.Af., foramen of Monro; gls., glottis; , internal narial opening; in/., infundibulum; lar, larynx: Q., left lung; , medulla oblongata; , optic lobe ; ass., oesophagus; , olfactory lobe; , posterior choroid plexus ; pit., pituitary body; , pineal stalk ; , third ventricle ; , fourth ventricle. which unites them. The left lobe is the larger and is itself deeply cleft into two. Between the right and left lobes lies the gall-bladder, which receives the green bile secreted by the liver and passes it by the bile-duct into the duodenum. The pancreas is an oblong, creamy-white structure lying between the stomach and duodenum. It is traversed by the bile-duct, into which it passes the pancreatic juice which it secretes. The food is not chewed, but is swallowed whole, the only use of the teeth being to prevent the escape of the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Borradaile, L. A. (Lancelot Alexander), 1872-1945. London : H. Frowde, Hodder & Stoughton
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1920
