The Cardiovascular System

The Cardiovascular System median(prenominal) Anatomy * The burden is hardened in the remaining side of the mediastinum * Consists of Three layers- epicardium, myocardium and endocardium * The epicardium covers the out surface of the center of attention * 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 deuce parts- parietal and visceral pericardium * The space in the midst of the both pericardial layers is the pericardial space * The heart also has four chambers- two atria and two heart ventricles * The go forth field 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 aortal valves The Blood supply of the heart comes from the Coronary arteries 1. Right coronary artery supplies the accountability atrium and RIGHT ventricle, inferior portion of the leftover ventricle, the POSTERIOR septal environ and the two customers- AV (90%) and SA node (55%) 2.

Left coronary artery- branches into the lumberjack and the circumflex branch * The LAD supplies line of merchandise 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- slowest conduction * 3. Bundle of His branches into the Right and the Left bundle ! branch * 4. Purkinje fibers- hurrying conduction The Heart sounds * 1. S1- delinquent to closure of the AV valves * 2. S2- repayable to the closure of the semi-lunar valves * 3. S3- cod to increased ventricular filling * 4. S4- due to forceful atrial contraction Heart rate * Normal run away is 60- coulomb beats per minute * Tachycardia is greater than 100 bpm * Bradycardia is less than 60...If you want to drag a dependable essay, order it on our website: OrderEssay.net

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