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Related post: belief that the heart and arteries dilate and contract simultaneously ; be-
cause, if this were Acai Berry For Sale the case, nothing could be driven from one cavity into
tbe o^er.
Under the imposing authority of Galen, the opinion had long prevailed
that the impulse of the arteries was derived from the heart by a sort of
propagation along the parieties of the arteries, and not at all by the im-
pctlae of the blood. But without refuting the absurd experiments by
which Galen had established his theory, it was quite sufficient to answer,
as Harvey did, that in an aneurism the pulsations are felt when the parie-
ties of the artery have been entirely destroyed.
But alter demdishing the old theories, the task yet remained of build-
ing up a new fabric in their stead. It then became necessary for him to
examine the movements ot the heart on Acai Berry Brazil living animals, and it is recorded
of him that when this organ was exposed to view, and he beheld its sys-
uAe and diastole taking place with almost the rapidity of thought, he
sbnittk from the task, and exclaimed, with Fraoastor : ^' The movements
of the h(«rt are known to God alone ! ^* He had nearly accepted the
Aristototian comparison of Acai Berry Diet Capsules the ebb and flow of the tide, but he persevered 100 Pure Acai Berry
and saw that as the animal grew weaker and life became nearly extinct,
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182 Neu) Orleans Acai Berry Online Medical New and ffoepital OatteUe,
the dififerent phenomena of the heart's action became plainer. He alao
attentively examined those movements on cold-blooded animals, and the
final result of his studies was a master-piece of obsei^ation and philo-
sophical analysis; so much so, indeed, that to this day scarcely anything
has been added to his description. Harvey proclaimed that ihe movement
of the heart is due to muscular action. He pointed oUt the shortening of
the heart during its systole, and its projection fonvard at the same moment
when it strikes the chest. It was maintained until then, and it has Acai Berry 100 Pure been
lately repeated (Beau) that the impulse of the heart against the chest
occurred during the diastole. The next step was to establish the circula-
tion of the blood ; the proofs he derived from various sources. Acai Berry Australia In the first
place, he ascertained the quantity of blood which passes through the heart
in a given time. No one had ever an idea of the kind anterior to him.
It was then that he made the foUowing celebrated calculation : ^Acai Berry Canada the food ; therefore, we
are bound to admit that in a given time the whole mass of the blood goes
repeatedly through the heart.'' He drew his arguments also from vene-
section, showing that where a large vessel is opened the animal will lose
all the blood in its body, and not that alone which is contained in a single
vein. Harvey likewise ascertained the use of the valves which are found
throughout the course of the veins Natural Acai Berry ; he insisted that their construction
did not allow the blood to flow from but towards the heart, and he com-
pared them to the sigmoid valves of the aorta and pulmonary artery.
. When Harvey's work appeared, the great mass of physicians, anato-
mists and physiologists denied the circulation of the blood. Acai Berry From Brazil Some, even,
who admitted it, pretended that it had long been known, and attributed
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ment of truth, or rendered homage Acai Berry In Australia to the genius of that illustrious man-
Yet Harvey lived to see his doctrines almost Acai Berry Sale universally admitted, and
thirty-four years after the publication of his work, the last and most
obstinate of his opponents publicly acknowledged his error and the truth
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Prof, Bemard^^ LeOurei m the Blood. IK
Though Harvey had prored irrefutably the oircnlation of the bloody and
its passage from the arteries into Acai Berry Puree the veins, yet Acai Berry Antioxidants the ocular demonstration
of this passage could not be given, and he himself was uncertain as
to the manner in which the communication took place. He could not tell
whether it was by direct vascular anastomosis, or by percolation through
the porous though solid tissues.
The direct demonstration was one of the earliest triumphs Acai Berry Supreme of the
mioroscope, but Harvey died before witnessing this last confirmation of his
theory. In 1661, Malpighuis saw the blood pass from the artery into the
vein on the mesenteiy, lung and urinary Acai Berry Power 500 bladder of a frog. The same
thing was more clearly demonstrated by Leuwenhoeck, in 1668, and after-
wards O. Cooper observed the same phenomena in warm-blooded animals,
vis., in the epiploon and mesenteiy of young dogs and cats.
LBCTUBE II.
The importance of an intimate acquaintance with the nature and pro-
perties of the blood is easily conceived, when we reflect that Acai Berry 1000mg the production
of blood b the most essential^ part of nutrition; for the blood Acai Berry Antioxidant being
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reproduction of its elements. This production of the elements of the
blood is the source of life, and the vital force and energy are in direct
ratio with the quantity of blood generated in the system. On the other
hand, the different pathological conditions of the blood give rise to* numer-
ous symptoms which it is important to know and to distinguish from each
other.
The physiology of the blood is yet imperfect, and numerous problems
are still open for investigation.
The mioographers have shown us the blood corpuscles and their difierent
properties; the Acai Berry Prices chemists have taught us the elementary composition of the
blood and the changes which it undergoes in passing from venous to
arterial blood. But acknowledging all the discoveries which are due to
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they went beyond their true limits when they undertook Brazil Acai Berry to explain all the
phenomena of life by purely chemical laws. Lavoisier, who compared the
body to a'frumaoe, lindertook to analyse all the materials which enter and
those which are discharged from ^e organism, but that cannot account for
the formation of the blood. Experiments have shown that in order to
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