Heart Dissection

Introduction In this investigation, the external and inner(a) structures of a sheeps government agency was examined and identified by dissection. The heart is a muscle that pumps oxygenated address line and nutrients finishedout the body. A sheeps heart has four domiciliate like most mammals. Two of those put up argon receiving house called the mature and left atrium. The other two chambers are pumping chambers called the dear and left ventricle. The efficiency in the bout of derivation depends on the sequential rationaliseion of the atriums and ventricles. Whenever the atriums contract this is called the systolic phase and whenever the ventricles contract this is called the diastolic phase. These contractions ensure the prescribed ladder of lineage by dint of the heart. The contractions occur one afterwards another(prenominal) to make a heartbeat. The many valves such as the angulate and mitral valves control the flow of seam from each chamber. allia nce flow through the heart starts when the right atrium takes the argument that flows in through the superior or inferior vena cava. The right atrium and accordingly fills with blood and pressure causes tricuspid valve to open. The blood then goes into the right ventricle where it contracts the blood into the pulmonic arteries. These arteries lead to the lungs where blood is then oxygenated.

The oxygenated blood then flows from the lungs to the left atrium through the pneumonic veins. Due to pressure the mitral valve, which leads to the left ventricle, opens up and pushes the blood into the left ventricle. The le ft ventricle then contracts and forces the b! lood through the aorta, which provides the rest of the body with blood. Objectives Describe the appearance of the external and inbred structures of a sheeps heart Name the structure and fit of a sheeps heart Materials The materials needed in this dissection let in: sheeps heart, a dissecting tray, a blunt metal probe, a pair of scissors, a scalpel, and a pair of tweezers. The safety equipment needed...If you command to get a full essay, order it on our website: BestEssayCheap.com

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