. Outlines of zoology. cave circulardiscs (elliptical in CamelidEe),but many good observersdescribe spherical or cup- „ , , ,,. shaped or bell - shaped red Fig. 390.—Duodenum of rabbit. li j rnrnn=;Hp! Tt i? nnt —From Krause, in part after °°°? corpuscles. It is not Claude Bernard. certam how far these shapes p., Pyloric end of stomach ;^.«., gall- are normal. The four-cham- biadder with bile duct and hepatic bercd heart lies in the thoracic ducts; ^.d., pancreatic duct. , cavity between the lungs. Itis surrounded by a thin pericardium, and immediately infront of it there lies the soft thymus,
. Outlines of zoology. cave circulardiscs (elliptical in CamelidEe),but many good observersdescribe spherical or cup- „ , , ,,. shaped or bell - shaped red Fig. 390.—Duodenum of rabbit. li j rnrnn=;Hp! Tt i? nnt —From Krause, in part after °°°? corpuscles. It is not Claude Bernard. certam how far these shapes p., Pyloric end of stomach ;^.«., gall- are normal. The four-cham- biadder with bile duct and hepatic bercd heart lies in the thoracic ducts; ^.d., pancreatic duct. , cavity between the lungs. Itis surrounded by a thin pericardium, and immediately infront of it there lies the soft thymus, which is larger in theyoung than in the adult animal. By two superior vense cavse, and by the inferior venacava, the venous blood collected from the body enters theright auricle. Thence the blood passes into the rightventricle through a crescentic opening, bordered by athreefold (tricuspid) membranous valve (worked by chordaetendinese attached to papillary muscles projecting from thewall of the ventricle).. VASCULAR SYSTEM, 71Z The right ventricle is not so muscular as the left,which it partly surrounds. By its contraction the bloodis driven into the pulmonary trunk, whose orifice isguarded by three semilunar valves. During contractionthe tricuspid valves are pressed together, so that noregurgitation into the right auricle can take place. The pulmonary trunkdivides into two pulmonaryarteries, which branch , intocapillaries on the walls of thelungs. There the red bloodcorpuscles gain oxygen, andthe blood is freed from much Fig. 391.—Circulatory system ofthe rabbit. (a) Letters to right— External internal External Subclavian Subclavian, Pulmonary artery (cut short). Pulmonary vein, Left V. Left Dorsal Hepatic Coeliac Anterior mesenteric! Suprarenal Left renal Left renal vein. K. ,tH. Posterio
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192, booksubjectzoology
