Chapter 18- the heart<3
Sa node
Spontaneously depolarizers causing the wave of depolarization that spreads through the rest of the conduction system and heart
Higher pressure in Syria than in ventricles forces
The av valves to opens and blood to move into ventricles
The tricuspid valve is located between
The right atrium and right ventricle
The left ventricle
Actively pumps blood to all body tissues via the aorta. The grater the mass of an organ the greater need for adequate blood supply. Which is why left ventricle is the hightes probably of being the site of myocardial infarction
Left ventricle eject blood into
Aorta
P wave
Atrial depolarization
Which part of the intrinsic conduction system delays the impulse briefly before it moves on to the ventricles
Av node. Giving the atria time to contract before the ventricles contract
Increased pressure in the ventricles would close what valve
Av valve only
Intercalated discs
Connect the individual heat muscle cells. They include desosomes(anchoring junctions) and gap junctions (communicating junctions)
ECG wave tracing represent
Electrical activity in heart
What causes the aortic semilunar valve to. Lose
Greater pressure in the aorta than in the left ventricle.
Normal heat sounds
Heart valve closure.
Put the phases of cardiac cycle on order starting with ventricular filling
ISOvolumentric contraction. Ventricular ejaculation. ISOvolumentric relaxation
Isovolumetric relaxation and ventricular filling occur
In ventricle diastole
The systemic circuit pump
Left side of heart
Which chamber of the heat sends oxygenated blood to the Aorta to the systemic circuit?
Left ventricle
Discern the right and left ventricles by
Noticing thickness of ventricle walla
Most of ventricular filling is
Passive. Atrial contraction. Adds just a little more blood. Open av valves
The presence of an incompetent tricuspid valve would have the effect of causing
Reduced efficiency in the delivery of blood to the lungs
Into which chamber of the heart do the superior vena cava, inferior vena cava and coronary sinus return deoxygenated blood?
Right atrium
The left and right ventricles pump the
Same volume of blood
QRS complex
Ventricular depolarizTion
T wave
Ventricular repolarization
