The Cardiovascular System

The Cardiovascular System prevalent Anatomy * The burden is located in the remaining side of the mediastinum * Consists of Three layers- epicardium, myocardium and endocardium * The epicardium covers the outer(a) surface of the tit * The myocardium is the position muscular layer of the heart * The endocardium lines the chambers and the valves * The layer that covers the heart is the PERICARDIUM * thither ar twain parts- parietal and visceral pericardium * The space in the midst of the 2 pericardial layers is the pericardial space * The heart also has quaternity chambers- two atria and two heart ventricles * The left atrium and the right atrium * The left ventricle and the right ventricle The heart chambers are guarded by valves * The atrio-ventricular valves- Tricuspid and bicuspid * The semi-lunar valves- Pulmonic and aortic valves The Blood supply of the heart comes from the Coronary arteries 1. Ri ght coronary thrombosis artery supplies the accountability atrium and RIGHT ventricle, inferior portion of the remaining ventricle, the POSTERIOR septal environ and the two nodes- AV (90%) and SA node (55%) 2.

Left coronary artery- branches into the lumberjack and the circumflex branch * The LAD supplies race to the preliminary wall of the LEFT ventricle, the anterior septum and the Apex of the left ventricle * The CIRCUMFLEX branch supplies the left atrium and the posterior LEFT ventricle The CONDUCTING SYSTEM OF THE HEART Consists of the * 1. SA node- the pacemaker * 2. AV node- slowe st conductivity * 3. Bundle of His bra! nches into the Right and the Left bundle branch * 4. Purkinje fibers- quick conduction The Heart sounds * 1. S1- delinquent to closure of the AV valves * 2. S2- imputable to the closure of the semi-lunar valves * 3. S3- receivable to increased ventricular filling * 4. S4- due to forceful atrial contraction Heart rate * Normal run away is 60-century beats per minute * Tachycardia is greater than 100 bpm * Bradycardia is less than 60...If you want to drag a enough essay, order it on our website: BestEssayCheap.com

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