After the blood has flowed through the arteries into the capillaries of the myocardium, 80% drains into veins that flow into the right atrium and 20% flows into the right ventricle. There, the deoxygenated blood mixes with the deoxygenated blood from the rest of the body.Case Report (CR) 10.1 (continued)Changes on Mr. Johnson’s ECG show he was having an MI. Cardiac muscle cells have very limited capability to replicate, and the repair of muscle cell death is mainly by fibrosis. This limitscardiac function; Mr. Johnson’s heart muscle will have a diminished capacity to contract normally after he recovers from the heart attack.AbbreviationMImyocardial infarction (“heart attack”)WORD ANALYSIS AND DEFINITIONS WORDPRONUNCIATIONELEMENTSDEFINITIONcoronaryKOR-oh-nair-ee SER-kyu-LAY-shunS/R/-ary pertaining tocoron- crownBlood flow through the vessels supplying the heartcirculation Latin to encircleendocardium EN-doh-KAR-dee-umS/P/R/-um structureendo- inside-cardi- heartThe inside lining of theheartendocardial (adj)EN-doh-KAR-dee-alS/-al pertaining toPertaining to the
endocardiumepicardium EP-ih-KAR-dee-umS/P/R/-um structureepi- upon, above-cardi- heartThe outer layer of the heart wallmyocardium MY-oh-KAR-dee-umS/R/CFR/-um structuremy/o- muscle-cardi- heartAll the heartmusclemyocardial (adj)MY-oh-KAR-dee-alS/-al pertaining toPertaining to the myocardiumparietal pah-RYE-eh-talS/R/-al pertaining topariet- wallPertaining to the outer layer of the pericardiumand other body cavitiespericardium per-ih-KAR-dee-umS/P/R/-um structureperi- around-cardi- heartStructure around the heartpericardial (adj)per-ih-KAR-dee-alS/-al pertaining toPertaining to the pericardiumpulmonary PULL-moh-NAIR-eeS/R/-ary pertaining topulmon- lungPertaining to the lungsand their blood supplysystemic sis-TEM-ikS/R/-ic pertaining tosystem- body as a wholeRelating to the entire organismvisceral VISS-er-alS/-al pertaining toPertaining
R/viscer- an organto the internal organs10.3 BLOOD FLOW THROUGH THE HEART The heart has four chambersFigure 10.4 External (a) and Internal (b) Anatomy of the Heart: Frontal View.1.Right atrium2.Right ventricle3.Left atrium4.Left ventricleThe right and left sides of the heart are separated by the cardiac septum, which can be described in two sections:●The right and left atria are separated by a thin muscle wall called the interatrialseptum.●The right and left ventricles are separated by a thicker muscle wall called the interventricularseptum.In addition, the atrioventricular (AV)septum is located between and behind the right atrium and left ventricle.Blood circulates around the body (through the systemic circulation) to unload oxygen and nutrients and pick up carbon dioxide and metabolic waste products. This deoxygenated blood returns to the heart via the superior and inferior venae cavae.
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- Fall '18