. Bensley's Practical anatomy of the rabbit : an elementary laboratory text-book in mammalian anatomy. Rabbits -- Anatomy. no ANATOMY OF THE RABBIT licail. nut. liiii//.<. jugular and subclavian veins, communicating with the right atrium of the heart through paired superior cavals^; from the posterior portions of the body through the unpaired and asymmetrical inferior caval vein, the latter passing forward on the right of the median plane and entering the posterior end of the right atrium. The second, short, or pulmonary circulation, is con- cerned with the distribution of the blood to the
. Bensley's Practical anatomy of the rabbit : an elementary laboratory text-book in mammalian anatomy. Rabbits -- Anatomy. no ANATOMY OF THE RABBIT licail. nut. liiii//.<. jugular and subclavian veins, communicating with the right atrium of the heart through paired superior cavals^; from the posterior portions of the body through the unpaired and asymmetrical inferior caval vein, the latter passing forward on the right of the median plane and entering the posterior end of the right atrium. The second, short, or pulmonary circulation, is con- cerned with the distribution of the blood to the lungs for purposes of aeration (Fig. 63). It is established by the right ventricle, the pulmonary artery and its paired branches, and the capillaries of the lungs. The blood is delivered to the left atrium through several pulmonary veins. A similar divi- sion of the circulatory organs occurs as a homoplastic modification in birds, which, it will be observed, are also warm-blooded vertebrates. In general, the blood which is distribut- valves^""^ '^^* atrioventricular gd to the various parts of the body passes through but one set of capillary vessels, and is then returned through the systemic veins to the heart. In all vertebrates, however, a special portion of the systemic venous circulation is set aside as the hepatic portal system distinguished by the possession of a second series of capillary vessels ramifying in the liver. Thus, in the rabbit and other mammals, the blood distributed to the stomach, spleen, and intestine through the coeliac and the superior and inferior mesenteric arteries, is collected into a main intestinal vessel, the portal vein, and the latter passes to the sinusoids of the liver, which take the place of true capillaries, differing from them as described on page 97. The liver receives also oxygenated blood, though in much smaller quantity, through the hepatic artery and the ultimate branches of this also empty bf///r wnlt. pnst. litnbs Fig. 61.
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