The Cardiovascular System

The Cardiovascular System form Anatomy * The burden is turn up in the remaining side of the mediastinum * Consists of Three layers- epicardium, myocardium and endocardium * The epicardium covers the outermost surface of the core * 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 argon dickens parts- parietal and visceral pericardium * The space in the midst of the two pericardial layers is the pericardial space * The heart also has quartet chambers- two atria and two heart ventricles * The left hand-hand(a) 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 a rteries 1. Right coronary artery supplies the accountability atrium and RIGHT ventricle, inferior portion of the odd ventricle, the POSTERIOR septal environ and the two guests- AV (90%) and SA node (55%) 2.

Left coronary artery- branches into the lumberjack and the circumflex branch * The LAD supplies rip 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 b undle branch * 4. Purkinje fibers- fas! test conduction The Heart sounds * 1. S1- delinquent to closure of the AV valves * 2. S2- ascribable 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- one hundred beats per minute * Tachycardia is greater than 100 bpm * Bradycardia is less than 60...If you want to drag a safe essay, order it on our website: OrderEssay.net

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