onnect.mlh ow/connect.html rt Vessels Concepts Help Place the correct words) in

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onnect.mlh ow/connect.html rt Vessels Concepts Help Place the correct words) in each statement to assess your understanding of the intrinsic control of the heartbeat. Not all choice be used The rhythmic contraction of the atria and ventricles is due to the intrinsic system of the heart that is made possible by the presence of AV (atrioventricular) nodal tissue, a unique type of cardiac muscle Nodaltissue, which has both ocated in two regions ot the heart and revous characteristics-IS atria is located in the upper dorsal wal of the night atrium. The s located in the base of the right atrium very near the septum The 40 to 60 The SA node intiates the heartbeat and sends out an excitation impuise every seconds, which causes the atria to contract. superior vena cava to when impuses reach the AV node asigt delay alows the _- tinish contraction before the begn to contract SA (sinoatrial) node because it usualiy keeps the The SA node is called the heartbeat regular 0 85 it the SA node fails so work propeny. the heart sll beats due to impuises Fo 0 8 6

Explanation / Answer

1. conduction 2. muscular 3. Sinoatrial (SA) Node and Atrioventricular (AV) node 4. 0.85 seconds 5. atria and ventricles 6. cardiac pacemaker 7. 40 to 60

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