. Un texte-livre en général la physiologie et l'anatomie. La physiologie, l'Anatomie Comparée ;. 182 CIEC0lation Cette est conique comme le coeur, mais le gros bout est en panne- ward et attachée à la membrane. Les deux l'intérieur du péricarde et de l'extérieur du coeur sont recouverts de membranes lisses sl'ippery, tandis qu'entre ces deux couches est un liquide qui humidifie la surface et réduit la friction entre eux comme les battements cardiaques. Le cœur est également bordée â &gt ; ;/ interne avec membrane fibreuse tandis que les murs entre les membranes externe et interne sont composés d'un genre particulier de musc à rayures

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. A text-book in general physiology and anatomy. Physiology, Comparative; Anatomy. 182 CIEC0LATION This is conical like the heart, but the broad end is down- ward and attached to the diaphragm. Both the inside of the pericardium and the outside of the heart are covered with smooth sl'ippery membranes, while between these two layers is a fluid which moistens the surfaces and lessens the friction between them as the heart beats. The heart is also lined â >;/ internally with fibrous membrane while the walls between these outer and inner membranes are composed of a peculiar kind of striped muscle tissue whose cells differ markedly from the striped cells of ordinary voluntary muscle. These muscular walls contain nerves, blood vessels, and connective tissue. Their thick- ness varies markedly in different parts of the organ. Internal structure of the heart. â (See Fig. 66.) On opening the heart, it is found to be completely separated into two distinct halves by a longitudinal partition or septum. Each of these halves, which are right and left in posi- tion, is divided by transverse partitions into an upper and lower cavity. The cavities which are at the broad end of the heart are thin walled and flaplike in appear- ance. From a fancied resemblatice to the ears of a dog they are called auricles. The other two cavities and the thick walls of muscle which surround them, make up the bulk of the heart. These latter cavities are called. Fig. GG â Kelation of cavities in one side of the lieart.. 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 work.. Eddy, Walter Hollis, b. 1877. New York, Cincinnati [etc. ] American book Co

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