Beth Anderson's Extra Credit due on 3/26/10 on the heart
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141843 on March 23, 2010
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Beth Andersons Extra Credit due on 3/26/10 on the heart
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Beth Anderson's Extra Credit due on 3/26/10 on the heart
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50 terms
Terms | Definitions |
|---|---|
 protects/anchors/prevents overfilling with blood | 2 functions of fibrous pericardium |
| cardiology | the study of the normal heart and diseases associated with it |
| pericardial/mediastinum/thoracic | the heart is located in a ________ cavity, which is found in the ________ which is located within the _______ cavity |
| mediastinum | medial cavity space between the pleurae of the lungs that extends from the sternum to the vertebral column |
| 2/3, left | approximately _____ of the hearts mass lies to the ______ of the mediasternal line |
| pericardium | the heart is enclosed in a double-walled sac called the what |
| fibrous pericardium | loose fitting superficial part of pericardium |
| serous pericardium | deep to fibrous pericardium; a thin, slippery, two-layer serous membrane |
| visceral layer | lines external heart surface |
| pericardial cavity | located between the two layers of serous pericardium, is filled with a thin layer of pericardial fluid |
| pericardial fluid | pericardial cavity is filled with what |
| reduce friction | function of pericardial fluid |
| epicardium | external layer of the heart |
| epicardium/myocardium/endocardium | list 3 layers of heart wall |
| endocardium | inner layer of heart wall |
| epicardium | visceral layer of serous pericardium |
| epicardium | smooth, slippery texture to outermost surface |
| 95 | _____% of heart is cardiac muscle |
| myocardium | layer of heart; cardiac muscle |
| endocardium | smooth lining for chambers of heart, valves, and continuous with the lining of large blood vessels |
| chambers of heart/valves/lining of blood vessels | where is endocardium found |
| 4 | how many chambers does the heart have |
| interatrial septum | the 2 atria are separated from each other by what |
| interventricular septum | the 2 ventricles are separated from each other by what |
| septum | a solid structure that separates two cavities |
| anterior interventricular sulcus | marks the anterior position of the septum separating right and left ventricles |
| posterior interventricular sulcus | provides similar landmarks as anterior interventricular sulcus on the posterior side |
| myocardium | the thickness of the ________ of the 4 chambers varies according to the function of each chamber |
| atria walls | are thin because they deliver blood to the ventricles |
| ventricle walls | are thinner because they pump blood greater distances |
| thinner, lungs | the right ventricle walls are _____ than the leaft because they pump blood into the _______, which are nearby and offer very little resistance to blood flow |
| thicker | the left ventricle walls are ______ because they pump blood through the body where the resistance to blood flow is greater |
| atria | the 2 upper chambers of the heart are called what |
| auricles | small earlike projections, extend anteriorly from the atria and help to increase atrial volume |
| interatrial septum | bears a shallow depression that marks the spot where the foramen ovale existed in the fetal heart |
| fossa ovalis | shallow depression on interatrial septum |
| foramen ovale | the fossa ovalis marks the spot where the _____ ______ existed in the fetal heart |
| reservoirs | atria function primarily as what |
| superior vena cava/inferior vena cava/coronary sinus | list 3 major veins entering the right atrium |
| superior vena cava | returns blood from the regions superior to the diaphragm |
| inferior vena cava | returns blood from regions below the diaphragm |
| coronary sinus | returns blood from the myocardium of the heart |
| tricuspid valve | blood flows through which valve from right atria to right ventricle |
| left atrium | forms most of the base of the heart |
| 4 pulmonary veins | what returns blood from the lungs |
| bicuspid valve | valve between left atria and left ventricle |
| left atrioventricular, mitral, bicuspid | list 3 names of bicuspid valve |
| ventricles | the two lower chambers of the heart |
| left ventricle | dominates the hearts posterior inferior surface |
| ventricles | major pumping chambers of the heart |
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