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Circuit that collects deoxygenated blood from the body and pumps it back into the lungs to be reoxygenation and CO2 removal.
Right side of heart |
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Left side of heart
Collects oxygenated blood from the lungs and pumps it to the body through the aorta. |
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| The space where the heart is located |
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| The outer tough membrane of the Pericardial Cavity |
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| also called the epicardium. The outside (outer layer) of the heart or the inner layer of the Pericardial cavity |
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| The space where the heart lies. Contains lubricant that prevents friction against the heart. |
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| The first layer of the heart |
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| Forms the heart embryonically.gets incorporated into the right atrium and this is where the heart beat originates. |
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| forms the heart embryonically. eventually develops into the great vessels (the pulmonary trunk and aorta). |
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| The sinus venosus becomes the |
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| Sinoatrial node. SA node. |
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| the pacemaker of the heart |
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| is an area of specialized tissue between the atria and the ventricles of the heart, which conducts the normal electrical impulse from the atria to the ventricles. |
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| From the His bundle, the electrical impulse enters the two “bundle branches” (the right and the left). The right and left bundle branches send the electrical impulse to the right and left ventricle, respectively. When the bundle branches are functioning normally, the right and left ventricles contract nearly simultaneously. |
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| wires that carry the electrical impluses from the SA node through both atria |
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| If the SA node is damaged... |
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| the other parts of the heart take over and become the pacemaker of the heart. |
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| Parasympathetic stimulation from _____ causes the heart rate to slow down. _____ speeds it up |
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Definition
Vagas nerve (cranial nerve 10).
Sympathetic stimulation |
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| ultimate control of the heart |
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| inflammation of the pericardium sometimes due to infection, radiation therapy, or connective tissue disease causing pain and friction rub. |
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| compression of the heart by an abnormal accumulation of fluid in the pericardial cavity; interfering with ventricular filling.may result from pericarditis |
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| any disease of the myocardium not resulting from coronary artery disease,valvular dysfunction, or other cardiovascular disorders.can cause dilation and failure of the heart, thinning of the heart wall or thickening of the intraventricular septum. |
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| inflammation of the endocardium,usually due to infection,especially streptococcus and staphlococcus bacterial infections |
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| inadequate blood flow to the myocardium, usually because of coronary atherosclerosis; can lead to myocardial infarction. |
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| seepage of fluid from the pericardium into the pericardial cavity, often resulting from pericarditis and sometimes causing cardiac tamponade |
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| EKG complete cardio circuit |
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| ventricular depolarization |
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| ventricular repolarization |
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| explain the activity of valves opening/closing while the heart beats. |
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| During atrial systole the tricupid and bicuspid valves are open…and blood drains from the atria into the ventricles without much pressure build up. During ventricular systole the ventricles and papillary muscles contract. The A-V valves are pulled shut and closed. Pressure now builds in both ventricles until they generate enough positive pressure to push open the two semilunar valves. The ventricles continue to contract and push blood into their respective vessels (what are they). As soon as the ventricles relax the pressure begins to drop…when it equals the corresponding vessel pressure the semilunar valves snap shut. |
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| inner layer of blood vessel.composed of a single layer of squamous epithelial cells and is called the endothelium. |
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| tunica media.. composed of? |
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| middle layer of blood vessel.is composed of connective tissue and smooth muscle cells that are arranged in a circular layer. |
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| outer layer of blood vessel. composed of connective tissue |
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| Capillaries are composed of only... |
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| the tunica intima layer = endothelium. |
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| elastica interna and elastica externa. |
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| Medium to large arteries contain layers of elastic tissue in the tunica media. |
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the ________is much thicker in arteries.
The ________ is much thicker in veins |
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| tunica media; tunica adventitia |
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| systole number. External pressure is slowly released until blood rushes through the artery.gushing is because blood only flows during systole |
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| second click of Karotkoff |
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| Pressure is slowly reduced until blood flow is continuous (=laminar flow) and this is recorded as the systolic pressure. |
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