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Updated: June 21, 2025
By alternately compressing and releasing the bulb, water is pumped from one vessel into the other. The bulb may be taken to represent one of the ventricles. What action of the ventricle is represented by compressing the bulb? By releasing the pressure? Show by a sectional drawing the arrangement of the valves in the syringe bulb.
It is the function of the auricles to collect the blood from the veins, to let this run slowly into the ventricles when both the auricles and ventricles are relaxed, and finally, by contracting, to force an excess of blood into the ventricles, thereby distending their walls.
The Duc de Berri, heir to the French throne, who was assassinated in 1826, lived several hours with one of his ventricles opened. His surgeon, Dupuytren, was reprimanded for keeping the wound open with a probe introduced every two hours, but this procedure has its advocates at the present day.
The vocal cords, as has been stated, lie parallel to each other, and the space between them is known as the glottis or chink of the glottis. Above the glottis and on opposite sides are two pockets or ventricles, and above these are the so-called false cords or ventricular bands. The pockets are, in fact, bordered below by the vocal cords and above by the false cords.
Hence the left ventricle seems to form the principle part of the heart; situated in the middle, more strongly marked, and constructed with greater care, the heart seems formed for the sake of the left ventricle, and the right but to minister to it. It is to be observed, however, that all this is otherwise in the embryo, where there is not such a difference between the two ventricles.
The second sound is, without doubt, caused by the sudden closure of the semilunar valves of the pulmonary artery and the aorta, at the moment when the contraction of the ventricles is completed. Muscular Fibers of the Ventricles.
He spoke alternately, or mixed up, Polish, Russian, and German; he had to be fed like a child, could not remember his name or the name of his native place, and died from exhaustion eight days after admittance into the hospital. On necropsy of the quite wrinkled body, the cerebral vessels were found full of blood, the ventricles full of serum.
The 'heart' is composed of four cavities; two above, called 'auricles', from their shape, and two below, termed 'ventricles', occupying the bulk of the heart.
In evidence that there could be no such openings he pointed out that, since the two ventricles contract at the same time, this process would impede rather than facilitate such an intra-ventricular passage of blood.
The latter purpose is accomplished as follows: Contraction of the ventricles fills the arteries overfull, causing them to swell out and make room for the excess of blood. Then while the ventricles are resting and filling, the stretched arteries press upon the blood to keep it flowing into the capillaries.
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