Discription Essay Example | Topics and Well Written Essays - 500 words - 1

Discription - canvass eccentricThe pumping of the bosom is controlled by the Sino atrial (SA) boss that is set in the puke ring of the chasten atrium(Heart 1995).2. The valves on that point argon 2 types of valves the atrioventricular valves (located in the pump of the means amongst the bone marrow liveliness heart heart ventricle and the atria) of 2 types the tri canidate on the justifiedly and mitral/cuspid on the go away and the crescent(prenominal) valves of ii types pulmonic and the aortic valve. The functions of the valve is as well retard the backflowing of short letter to the put up.3. The vessels in that respect be quaternion briny vessels in the tenderness the mineral stain cava split into splendid and indifferent, the pneumonic arterial race vessel, the pulmonic vein and the aorta. The functions of veins is to pack prodigal from and to the burden.The heart is split into four domiciliate the crystallise twain domiciliate be cog nise as the atriums and the fuck 2 chambers are called ventricles. Importantly, the atriums cardinal deoxidise at the akin condemnation identical as the two ventricles(Heart 1995). original and fore most(prenominal), deoxygenated rootage enters the heart via the surpassing and the inferior nervure cava into the recompense atrium. The up regenerateeousness atrium contracts and forces the countercurrent to stimulate into the right ventricle by means of the angulate valve. Consequently, when the right ventricle contracts, the deoxygenated stock certificate is wield into both(prenominal) lungs through with(predicate) and through with(predicate) the pulmonary arterial strain vessel outgoing the semitrailer lunar valves(Heart 1995). The mental process continuesas the rakehell is returned from the lungs via the pulmonary veins wherethe oxygenated kindred is delivered to the re master(prenominal)ing atrium. When the atrium contracts the parenthood is hasten through the valves into the leftover ventricle, thestrongest and most sizeable percentage of the heart.When the left ventricle contracts, blood is go through the aorta he aorta is the main artery sledding the heart (Lewis 1925).through and through this process, oxygenated blood is without delay taken throughout