Term
| Stucture of the pericardium |
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Definition
superficial=fibrous pericardium
deep two layer serous pericardium=parietal pericardium,visceral pericardium(epicardium) |
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Term
| Function of the Pericardium |
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Definition
protects and anchors
prevents overfilling
allows the heart to work friction free
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Term
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Definition
| visceral layer of the serous pericardium |
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Term
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Definition
| cardiac muscle layer forming the bulk of the heart |
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Term
| fibrous skeleton of heart |
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Definition
| crisscrossing, interlacing layer of connective tissue |
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Term
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Definition
| endothelial layer of the inner myocardial surface |
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Term
| There are 4 great vessels. What are they? |
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Definition
vena cava (sup. inf.)
pulmonary veins (r. l.)
Aorta
pulmonary trunk |
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Term
| What are the vessels that carry blood to the heart? |
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Definition
Vena Cava
Pulmonary veins |
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Term
| What are the vessels that acarry blood away from the heart? |
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Definition
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Term
| What are the 4 Chambers of the heart? |
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Definition
Atria (r. l.)
Ventricles (r. l.) |
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Term
| What are the 4 valves of the heart? |
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Definition
Atrioventricular (tri. bicuspid.)
Semilunar (aortic and pulmonary) |
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Term
| What are the recieving chambers of the heart? |
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Definition
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Term
Each atrium has a protruding _______?
(ear) |
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Definition
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Term
Blood enter the Right Atria from where?
(3 terms) |
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Definition
superior/inferior vena cava
coronary sinus |
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Term
| Blood enters the Left Atria from where? |
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Definition
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Term
Ventricles are the______chambers of the heart. |
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Definition
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Term
| what kind of muscles mark ventricular walls? |
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Definition
papillary muscles
trabeculae carneae muscles |
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Term
| What ventricle pumps blook into the pulmonary trunk? |
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Definition
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Term
| What ventricle pumps blood into the Aorta? |
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Definition
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Term
| Which ventricle has the thickest myocardium? |
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Definition
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Term
| What do the Atrioventricular (AV) Valves do? |
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Definition
| Ensure unidirectional blood flow throug the heart by preventing back flow into the atria when ventricles contract. |
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Term
| Tricuspid valve lies where? |
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Definition
| between the right atrium and the right ventricle |
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Term
| where does the bicuspid valve lie? |
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Definition
| between the left atrium and left ventricle |
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Term
| What does the Chordae do? |
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Definition
| Anchors AV valves to papillary muscles |
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Term
| What are the two Semilunar Valves? |
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Definition
Pulmonary semilunar
Aortic Semilunar |
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Term
| What is and what does the pulmonary semilunar valve do? |
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Definition
it is at the entrance to pulmonary trunk artery (to lungs).
prevents backflow to R ventricle |
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Term
What is and what does the Aortic semilunar valve do?
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Definition
at enterance to aorta (to body)
prevents backflow of blood into L ventricle |
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Term
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Definition
| blood to and from the lungs |
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Term
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Definition
| Blood to and from the rest of the body |
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Term
| what carries blood through these circuits? |
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Definition
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Term
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Definition
| carry blood away from the heart |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| striated, short, fat, branched and interconnected |
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Term
| What anchors cardiac cells together? |
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Definition
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Term
| the conective tissue endomysium acts as both_______ and ______ |
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Definition
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Term
| heart muscle act as one. Its a functional |
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Definition
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Term
| What is heart muscle stimulated by? |
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Definition
| nerves, and is self excitable |
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Term
| Has a long absolute refractory period of____? |
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Definition
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Term
| heart muscle contraction is similar to what other contraction |
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Definition
| skeletal muscle contraction |
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Term
| Authorythmic cells are also called |
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Definition
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Term
| Autorhythmic cells/intrinsic charactoristics? |
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Definition
-initiate action potentials
-have unstable resting potentials called pacemaker potentials
-use calcium influx for rising phase of action potential |
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Term
| Autonomic Nervous System is also called? |
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Definition
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Term
| Charactoristics of Extrinsic/autonomic nervous system? |
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Definition
-stimulated by the sypathetic cardioacceleratory center
-inhibited by the parasympathetic cardioinhibatory center |
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