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    which of the following is not part of the intrinsic conduction system of the heart?

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    Cardiac conduction system

    A network of specialized muscle cells is found in the heart's walls. These muscle cells send signals to the rest of the heart muscle causing a contraction. This group of muscle cells is called the cardiac

    Cardiac conduction system

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    Overview

    A network of specialized muscle cells is found in the heart's walls. These muscle cells send signals to the rest of the heart muscle causing a contraction. This group of muscle cells is called the cardiac conduction system.

    The main parts of the system are the SA node, AV node, bundle of HIS, bundle branches, and Purkinje fibers.

    Let's follow a signal through the contraction process. The SA node starts the sequence by causing the atrial muscles to contract. That's why doctors sometimes call it the anatomical pacemaker.

    Next, the signal travels to the AV node, through the bundle of HIS, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract.

    This signal creates an electrical current that can be seen on a graph called an electrocardiogram, or EKG. Doctors use an EKG to see how well the cardiac conduction system works. Any changes on the EKG can mean serious problems.

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    Which of the following is NOT part of the intrinsic conduction system of the heart? a. sinoatrial (SA) node b. atrioventricular (AV) node c. bundle branches d. atrioventricular (AV) valve

    Answer to: Which of the following is NOT part of the intrinsic conduction system of the heart? a. sinoatrial (SA) node b. atrioventricular (AV) node c....

    Health & Medicine

    Which of the following is NOT part of the intrinsic conduction system of the heart? a. sinoatrial...

    Which of the following is NOT part of the intrinsic conduction system of the heart? a. sinoatrial... Question:

    Which of the following is NOT part of the intrinsic conduction system of the heart?

    a. sinoatrial (SA) node

    b. atrioventricular (AV) node

    c. bundle branches

    d. atrioventricular (AV) valve

    Conduction System of the Heart:

    In order for the heart to pump blood effectively, it needs to contract in a specific manner so that blood exits and enters each chamber of the heart appropriately. The intrinsic conduction system of the heart is responsible for this function.

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    The d. atrioventricular (AV) valve is NOT part of the intrinsic conduction system of the heart and therefore the correct answer. The atrioventricular...

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    Heartbeat and Heart Contraction Coordination

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    Chapter 13 / Lesson 9

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    The heart has a regulatory system, known as the intrinsic conduction system, that determines the pace of the heartbeat. Learn about the intrinsic conduction system, including the SA node, AV node, the bundle of His, bundle branches, and Purkinje fibers, and discover its role in heart contraction coordination.

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    Anatomy and Physiology II: Cardiovascular Ch. 18 Flashcards

    Study with Quizlet and memorize flashcards terms like Objective One: Sketch and label the fibrous and serous pericardium layers. Include the pericardial cavity and epicardium., Myocardium (Objective Two), Endocardium (Objective Two) and more.

    Anatomy and Physiology II: Cardiovascular Ch. 18

    10 studiers in the last day

    Objective One:

    Sketch and label the fibrous and serous pericardium layers. Include the pericardial cavity and epicardium.

    Click card to see definition ๐Ÿ‘†

    -Pericardium: double-walled sac that encloses the heart

    -Fibrous pericardium: loosely fitting durable outer layer made of connective tissue; protects the heart; anchors heart to surrounding structures; prevents overfilling of the heart

    -Serous Pericardium: thin inner layer

    -Parietal layer: "outer layer" that makes contact with fibrous pericardium; attaches to the arteries exiting the heart

    -Pericardial Cavity: contains serous fluid to allow heart to move in friction-free environment

    Click again to see term ๐Ÿ‘†

    Myocardium (Objective Two)

    Click card to see definition ๐Ÿ‘†

    Middle layer of the heart wall; myo-muscle, or the layer that contracts

    -Circular cardiac muscle bundles allow all of the parts of the heart to be connected

    Click again to see term ๐Ÿ‘†

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    Essentials of Human Anatomy and Physiology

    8th Edition Elaine N. Marieb 648 explanations

    Hole's Essentials of Human Anatomy and Physiology

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    David N. Shier, Jackie L. Butler, Ricki Lewis

    1,633 explanations

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    Terms in this set (46)

    Objective One:

    Sketch and label the fibrous and serous pericardium layers. Include the pericardial cavity and epicardium.

    -Pericardium: double-walled sac that encloses the heart

    -Fibrous pericardium: loosely fitting durable outer layer made of connective tissue; protects the heart; anchors heart to surrounding structures; prevents overfilling of the heart

    -Serous Pericardium: thin inner layer

    -Parietal layer: "outer layer" that makes contact with fibrous pericardium; attaches to the arteries exiting the heart

    -Pericardial Cavity: contains serous fluid to allow heart to move in friction-free environment

    Myocardium (Objective Two)

    Middle layer of the heart wall; myo-muscle, or the layer that contracts

    -Circular cardiac muscle bundles allow all of the parts of the heart to be connected

    Endocardium (Objective Two)

    Innermost layer of the heart wall; lines heart chambers and covers the valves

    Objective Three:

    Describe, draw, and label a gross anatomy diagram of the heart showing: four chambers, four valves, five great vessels, septums, grooves, pectinate muscles, chordea tendinae, trabeculae carne, and papillary ridges

    Pathway of Blood through the Heart

    (Objective Four)

    Inferior and Superior Vena Cava ---> R. Atrium ---> Tricuspid Valve ---> R. Ventricle ---> Semilunar Valve ---> Pulmonary Artery (Deoxygenated Blood) ---> Lungs

    --->R. and L. Pulmonary Veins (Oxygenated Blood) ---> L. Atrium ---> Mitral (Bicuspid) Valve ---> L. Ventricle ---> Aortic Valve ---> Aorta ---> Brachiocephilac Trunk, Left Common Carotid Artery, and Left Subclavian Artery

    Objective Five: Explain why the heart is termed the "double pump." Contrast this description to the actual action of the atria and ventricles as functional units.

    Although it is easier to see working on one side of the heart at a time, in reality both the right AND left sides of the heart are working (almost) simultaneously.

    Pulmonary Circulation

    (Objective Six)

    The blood vessels that carry blood to and from the lungs; the right side of the heart receives oxygen-poor blood from body tissues then pumps this blood to the lungs to pick up oxygen and dispel CO2

    Coronary Circulation

    (Objective Seven)

    -Left Coronary Artery: runs toward the left side of the heart and divides into two major branches:

    -Anterior Interventricular Artery: supplies interventricular sulcus and anterior walls of both ventricles; "The Widowmaker"

    -Cicrumflex Artery: supplies the left atrium and the posterior walls of the left ventricle

    -Right Coronary Artery: courses to the right side of the heart and divides into two major branches:

    -Right Marginal Artery: Serves the myocardium of the lateral side of the heart

    -Posterior Interventricular Artery: Runs to heart apex and supplies the posterior ventricular walls

    Coronary Circulation and Disease

    (Objective Seven)

    -Myocardial Infarction- e.g. heart attack; plaque buildup in the artery blocking blood flow and O2 to the heart

    -Angina- A type of chest pain, pressure, or discomfort; heart is not receiving enough oxygen due to narrowed coronary artery

    -Ischemia- inadequate blood supply to heart muscles

    Lubb-Dupp noise (Objective Eight)

    The "lubb" is the first heart sound, commonly termed S1, and is the turbulence of blood caused by the closure of mitral and tricuspid valves at the start of systole

    Source : quizlet.com

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