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