BSCI 202: Practical 1

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A. Superior vena cavaP. Ascending aortaQ. Aortic arch

L. Left atriumM. Biscuspid (mitral) valveN. Left ventricleO. Aortic semilunar valveV. Chordae tendinaeW. Papillary muscleY. Myocardium (cardiac muscle)

I. Left pulmonary arteryK. Left pulmonary veinsR. Descending artery

C. Right atriumD. Tricuspid valve5. Anterior cardiac vein

Q. Aortic archS. Brachiocephalic arteryT. Left common carotid arteryU. Left subclavion artery

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E. Right ventricleV. Chordae tendinaeW. Papillary muscle4. Anterior interventricular artery

SA node generates impulse; atrial excitation begins

Impulse delayed at AV node

Sequence of heart excitation: Link to ECG, text and image (4 steps); See Fig. 31.3

Impulse passes to heart apex; ventricularexcitation beings

Ventricular excitationcomplete

Fig. 31.2: Know the intervals of an ECG; Be able to link this to nodes and contraction