. A manual of elementary zoology . Zoology. THE FROG : VISCERA AND VASCULAR SYSTEM 61 fluid, known as lymph, which is produced by exudation through the capillary walls. This fluid is gathered by small lymphatic vessels into the big lymph sacs already mentioned, whence it is pumped back into the veins by two pairs of small contractile sacs known as lymph hearts. One pair of these lies below the scapulas and opens into the sub- scapular veins; the other lies at the end of the urostyle and opens into the femoral veins. Sinus venosus ^ Right auricle : Venrricle^. Truncus arteriosus, I , Lungs &quo
. A manual of elementary zoology . Zoology. THE FROG : VISCERA AND VASCULAR SYSTEM 61 fluid, known as lymph, which is produced by exudation through the capillary walls. This fluid is gathered by small lymphatic vessels into the big lymph sacs already mentioned, whence it is pumped back into the veins by two pairs of small contractile sacs known as lymph hearts. One pair of these lies below the scapulas and opens into the sub- scapular veins; the other lies at the end of the urostyle and opens into the femoral veins. Sinus venosus ^ Right auricle : Venrricle^. Truncus arteriosus, I , Lungs "J- . -•-- V Left auricle r Ventricle <• Truncus arteriosus Head. Sinus venosus Fig. 32.—A diagram of the circulation of the blood in the frog. \ Thick lines indicate venous blood, narrow lines arterial. The respiratory organs of the frog are the lungs, the skin, and the mucous membrane of the mouth. Respiration. The lungs communicate with the pharynx by way of the glottis, which leads into a short, wide windpipe consisting of the larynx or voice organ only, without the long trachea, or windpipe proper, which is found in animals with necks. The walls of this cavity are supported by a pair of fiat arytenoid cartilages and a very. 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
