An elementary physiology and hygiene for use in upper grammar grades . Heart. are connected with each other. The two on the otherside, the left auricle and the left ventricle, are also con-nected with each other There is no connection beFrom* Head tween the two sides of the heart; the blood cannot flow directly from oneside to the other. As the heart beats,blood which has just com-pleted the round of thebody, and is full of im-purities which it hasgathered, flows into theright auricle through thelarge veins from the headand body, indicated in Figure 23, and fills both the rightauricle and the
An elementary physiology and hygiene for use in upper grammar grades . Heart. are connected with each other. The two on the otherside, the left auricle and the left ventricle, are also con-nected with each other There is no connection beFrom* Head tween the two sides of the heart; the blood cannot flow directly from oneside to the other. As the heart beats,blood which has just com-pleted the round of thebody, and is full of im-purities which it hasgathered, flows into theright auricle through thelarge veins from the headand body, indicated in Figure 23, and fills both the rightauricle and the right the heart contracts, thatis, the muscles of the walls pressthe blood out, as we squeeze thejuice out of a lemon by closingthe hand tightly about it. Whenthe heart contracts, the bloodforces its way into the pulmo-nary artery, shown in Figure pulmonary artery carries itto the lungs to be purified. From the lungs the purifiedblood comes back to the heart again, this time by veinswhich send it into the upper of the two chambers at From Lwjw. Fig. 24. — The Left Sideof the Heart.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
