. Human physiology. nd delivering itto the left ventricle, h, which pro-pels it through the aorta, i, to thesystemic capillaries, y, ivhence it Is 332 CIRCULATIOISr. If we consider the heart to be the centre, two circulations must beaccomplished, before the blood, setting out from one side of the heart,performs the whole circuit. One of these consists in the transmissionof the blood from the right side of the heart, through the lungs, to theleft; the other, in its transmission from the left side, along the arteries,and by means of the veins, back to the right. The former is called thelesser or
. Human physiology. nd delivering itto the left ventricle, h, which pro-pels it through the aorta, i, to thesystemic capillaries, y, ivhence it Is 332 CIRCULATIOISr. If we consider the heart to be the centre, two circulations must beaccomplished, before the blood, setting out from one side of the heart,performs the whole circuit. One of these consists in the transmissionof the blood from the right side of the heart, through the lungs, to theleft; the other, in its transmission from the left side, along the arteries,and by means of the veins, back to the right. The former is called thelesser or pulmonic, the latter the grexiter or systemic circulation. Theorgans, by which these are effected, will require a more detailed exa-mination. 1. AXATOMT OF THE CIRCULATORY ORGANS. The circulatory apparatus is composed of organs by which the bloodis put in motion, and along which it passes during its circuit. a. Heart. To simplify the consideration of the subject we shall consider the heart double; and that Fig. Heart placed with its Anterior Surfnce upward?, and its Apexturned to the right hand of the spectator. The Right Auricleand Right Ventricle are both opened. Parts in right auricle:—h. Eutrance of vena cava superior, whichis itself markeil d. Inferior cava, maiked r, has a prohe passedthrough it into the auricle, rn. The smooth part of the auricle, pectiuati, seen in the auricular appendix which is cut Eustachian valve placed over the mouth of the inferior cava. ovalis, or vestige of the foramen ovale, s. Annulus probe leading from s into the right ventricle passes through theauriculo-veutricular opening, v. Mouth of the coronary vein. Partsin the right ventricle, in which the other end of the probe, from s,appears:—a. Cavity of couus , leading to the pulmonaryartery, Jr. I. Convex septum between the ventricles, c. Anteriorsegment of the tricuspid valve, connected by slender cords, thechordae tendiuea, to the muscu
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Keywords: ., bookauthordungliso, bookcentury1800, bookdecade1850, bookyear1856
