Term
| The heart wall is made of 3 layers |
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Definition
| epicardium, myocardium and endocardium |
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Term
| The heart contains 4 chambers |
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Definition
| the right atrium, left atrium, right ventricle, and left ventricle. |
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Term
| The heart valves can be broken down into two types |
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Definition
| atrioventricular and semilunar valves |
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Term
| The AV valve on the right side of the heart is called |
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Definition
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Term
| The AV valve on the left side of the heart is called |
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Definition
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Term
| The AV valves are attached on the ventricular side to tough strings called |
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Definition
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Term
| The semilunar valve on the right side of the heart is |
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Definition
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Term
| The semilunar valve on the left side of the heart is |
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Definition
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Term
| The chambers on the right side of the heart are (1) and have (2) in their heart wall when compared to the left side of the heart. |
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Definition
(1) smaller
(2) less myocardium |
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Term
| The conduction system starts with the pacemaker of the heart—a small bundle of cells known as |
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Definition
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Term
| The SA node is located in |
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Definition
| the wall of the right atrium inferior to the superior vena cava |
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Term
| The signal from the SA node is picked up by another mass of conductive tissue known as |
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Definition
| the atrioventricular (AV) node |
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Term
| The AV node is located in |
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Definition
| the right atrium in the inferior portion of the interatrial septum |
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Term
| The AV bundle is a strand of conductive tissue that runs through |
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Definition
| the interatrial septum and into the interventricular septum |
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Term
| At any given time the chambers of the heart may found in one of two states |
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Definition
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Term
| During systole, cardiac muscle tissue |
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Definition
| is contracting to push blood out of the chamber |
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Term
| During diastole, the cardiac muscle cells |
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Definition
| relax to allow the chamber to fill with blood |
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Term
| There are 3 phases to the cardiac cycle |
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Definition
| atrial systole, ventricular systole, and relaxation |
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Term
| Atrial systole: To facilitate this filling, the AV valves stay (1) and the semilunar valves stay (2) |
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Definition
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Term
| Ventricular systole:The pressure of the ventricles forces the semilunar valves to (1) and the AV valves to (2) |
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Definition
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Term
| During the atrial systole phase of the cardiac cycle, the atria contract and push blood into |
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Definition
|
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Term
| During ventricular systole, the ventricles contract to push blood into |
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Definition
| the aorta and pulmonary trunk |
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Term
| During ventricular systole, the ventricles contract to push blood into |
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Definition
| the aorta and pulmonary trunk |
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Term
| Deoxygenated blood returning from the body first enters the heart from |
|
Definition
| the superior and inferior vena cava |
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Term
| From the pulmonary veins, blood enters the heart again in |
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Definition
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Term
| The left atrium contracts to pump blood through the (1) into the (2) |
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Definition
(1) mitral valve
(2) left ventricle |
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