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39 Cards in this Set
- Front
- Back
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What is the size of the heart |
The size of a fist 10oz, 3.5 wide at base and 5in from the base to apex |
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What cavity is the heart located in? |
Thoracic cavity what does the atrium do |
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What does the atrium do ? |
It receives blood returning to the heart |
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What does the ventricles do? |
They pump blood to the arteries |
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What is the pericardial sac other name? |
Pericardium |
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What is the pericardium? |
A double walled sac that enclose the heart cavity |
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What is the pericardium made out of? |
Fibrous and 2 serous layers |
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What is the serous pericardium and what is the function? |
•it refers to the parietal and visceral layer of the pericardium • it allows the heart to beat without friction,provides room to expand, yet resist excessive expansion |
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What is the fibrous pericardium? |
•It’s the most superficial layer of the pericardium •Tough fibrous layer of dense connective tissue |
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What is the myocardium and the function? |
•thick middle layer of the heart • perform the work of the heart |
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What are the characteristics of cardiac muscle cells? |
• branched • single nucleus • striated • intercalated discs |
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Function of intercalated discs ? |
Support synchronized contractions |
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What is pecinate? |
Myocardial ridges in atria, that increase power of the contractions |
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What is trabeculae carnae? |
Round columns of myocardium in ventricles that pull the valves open |
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What is another name for endocardium? |
Visceral layer |
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Characteristics of endocardium |
• smooth inner lining of the heart and blood vessels. Also covers valve surfaces • has simple squamous epithelium cells and areolar tissue • function is to protect |
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Characteristics of the epicardium? |
•is the serous membrane of the external heart surface •coronary blood vessels travel through this layer |
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What is the fibrous skeleton |
The framework of collagen and elastic fibers. • form and anchors valves |
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Function of the papillary muscles |
Contract the semilunar valve |
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What is the function for chordate tendonae |
Connect av valve to papillary muscle, to keep valve from being floppy |
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Vena cava function |
Receive deoxygenated blood from the body |
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Function of the pulmonary trunk and arteries |
Takes deoxygenated blood from the right ventricles and deliver it to the lungs |
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Function of dictums arteriosis |
Allows most of right ventricle blood to bypass the unfunctional fluid fold lungs in fetus |
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Function of ligamentum artiosm |
Allows blood to bypass everything in a fetus heart |
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Function of pulmonary veins |
Receives oxygenated blood from the lungs and delivers it to the left atrium |
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Function of the aorta |
Takes oxygenated blood from the left ventricle to all organs of the body |
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What does the atrioventricular valves do? |
Control backflow better the atria and ventricles |
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What does the semilunar valves do |
Prevent back flow from the ventricles to the greater arteries |
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What is the systemic circuit |
Carries blood to and from the lungs, it’s supplied by the right side of the heart |
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What is the systemic circuit |
Carries blood to and from the lungs, it’s supplied by the right side of the heart |
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What is the pulmonary circuit |
Carries blood to and from all of the organs, it’s supplied by the left side of the heart |
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Coronary circulation function |
Provides blood to the heart |
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What is the left and right coronary artery located |
A small opening in the ascending aorta |
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What is the anterior interventricular branch |
Apart of the left CA Travels in anterior inter ventricular sulcus |
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What is the circumflex branch |
Apart of the left AC Travels in the coronary sulcus |
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What is the right marginal branch |
Apart of the right AC Run towards the apex of the heart |
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What is the posterior interventricular branch |
Apart of the right AC Travels in posterior interventricular sulcus |
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What is the coronary sinus |
Drains into a small hole found in the RA that drains deoxygenated blood from the heart Fed by cardiac veins |
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What are the 4 cardiac veins |
Great cardiac vein Middle cardiac vein Anterior cardiac vein small cardiac vein |
