Function of the heart and pulse rate

Play the role of pumping of the heart, send the blood to various parts of the body, and is the channel of the circulation of the blood and blood vessels.


The pumping function of the heart is not a haphazard operation, but by acertain rhythm of repeated systolic and diastolic. Responsible formaintaining a regular rhythm of the heart nerve known as vegetative, isdivided into the sympathetic and parasympathetic nervous


Sympathetic roles is to make the contraction and relaxation of the heart‘srhythm to accelerate, and parasympathetic reduction carried out andcoordinated in order to maintain the two heart operations.


Rhythm of contraction and relaxation of the heart is divided into systolic,diastolic, and Jin General called the cardiac cycle. 60-70 cycles per minuteadult men, adult female 70-80 cycles per minute.


Cardiac output blood flow varies depending on the State of the body, whilethe body is at rest, about 5 litres per minute.


Each contraction of the heart 1 (1 cycle) the outputs of blood volume, 60~80ml, and wave to convey to blood vessels, but flexible blood vessels alsohave temporary expansion. When volatility through the blood vessels, thevessels will revert to the original state.


In other words, the blood vessels are according to the rhythm of the heart(pulse), and expansion and contraction.


The vasomotor is blood to blood vessels changes in blood pressure, it will be as the heart beats, rise or fall according to a rhythm.


This a certain rhythm of blood pressure and pulse pressure. If in vitro withfinger touch pulse pressure is called pulse.

Heart bypass (coronary circulation)

We have described in the preceding paragraphs, the heart is the center ofcirculation, and pumping function.


However, to make the heart maintain normal operation, it requires energy.And for the supply of such energy, to transport nutrients and oxygen to theheart, is the cardiac blood flow path, or the coronary circulation.


The self-contained heart circulation and systemic branch of coronary arteryis responsible for. Obviously, the heart itself although it has a lot ofblood, but unable to obtain energy from the cavity of the heart‘s bloodsupply depends on coronary artery. If necrosis of myocardial ischemia incoronary artery obstruction, it is called a myocardial infarction, which isone of the major complications of high blood pressure.

The pulmonary circulation (small circulation)

Preceding cycle (cycle), whose main function is to transport nutrients andoxygen to the body, and unnecessary carbon dioxide emissions and waste, andtransported back to the lungs, into the pulmonary circulation.


The main function of the pulmonary circulation, is in the systemiccirculation is unnecessary carbon dioxide and wastescontaminated blood,transported to the lungs, removing excess carbon dioxide, oxygen, and keepthe blood pH of moderately.


Venous blood from the body to the heart, into the right atrium, then fromthe right atrium into the right ventricle and was sent from there names forthe pulmonary blood vessels. Pulmonary artery is divided into two roads onthe way. Stretch respectively to the left and right lung, and lung and intocapillaries.


The blood reach the lungs, releasing carbon dioxide, receiving oxygen,oxygenated blood through the Pulmonary veins into the left atrium from theleft atrium into the left ventricle, in accordance with the foregoing intocirculation.


So, according to a heart of cardiac pulmonary-‘ pulmonary venous bloodcirculation routes, known as pulmonary or lesser circulation.

Systemic circulation (circulation)

Systemic circulation and circulation, and the pulmonary circulation, bloodflow is an important route.
Blood from the left ventricle output along big arterial flow. Separate main artery from bi arterial arch modified from Alday, t flow body: the leftcommon carotid artery and the subclavian artery and the head tube thousandsof arteries and arterial flow to the lower part of the body, are separatedby the descending aorta abdominal aorta, renal artery, mesenteric stoutnessartery and continues with arteries, extending to various parts of the body.


Branched arteries, in various parts of the body to form microvessels, sendthe oxygen and nutrients to every cell, and takes away carbon dioxide andother waste in a cell. Give off oxygen and nutrients in the microvascularand accept blood carbon dioxide and wastes, in order to flush out carbon dioxide and waste, you must consult the vein once again flow back to theheart.


Such a branch along the main artery of the heart artery a body part(capillary) one vein, one heart‘s blood line, known as the systemiccirculation, also known as the loop.


So-called high blood pressure is reached in the microvascular circulationbefore, blood pressure and achieve a higher than normal condition.

Knowledge of blood pressure and blood circulation

In recognition of high blood pressure, one must first understand the basicknowledge of blood pressure and blood circulation. Its principle is notcomplicated, and understanding it is not difficult. Weiblood pressure, isdue to the contraction of the heart function, sending blood around the bodyafter two weeks. Flow back to the heart, and that‘s from the heart sendblood pressure affect blood vessel walls, blood vessel expansion. This forceis called pressure. It can be seen. The heart is the center of circulation.


Nutrients in food and drink, and after a fairly complex process of digestionand absorption in the body, eventually by blood intake and intake of oxygenthrough breathing, heart to blood vessels, then transport to various partsof the body in order to meet the needs of the body‘s metabolism.


Blood in addition to deliver oxygen and nutrients to all parts of the body,also will be the site of the waste out of the body, then x to accept newoxygen and nutrients. Again from the heart served on various parts of thebody.


This means that the heart is the Centre of blood circulation. It throughtheir own regular contractile activity, so that the blood flow throughoutthe body.


The cycle path can be divided into the systemic circulation of blood(cycle), the pulmonary circulation (small circulation), cardiac (coronarycirculation).