1) What is the main function of the heart? a) Pump blood b) Digest food c) Filter waste d) Store energy 2) What type of tissue is cardiac muscle? a) Skeletal b) Smooth c) Cardiac d) Connective 3) Which valve is between the left atrium and ventricle? a) Tricuspid b) Mitral c) Aortic d) Pulmonary 4) What is the role of heart valves? a) Prevent backflow b) Increase pressure c) Store blood d) Reduce friction 5) What is the first phase of the cardiac cycle? a) Diastole b) Systole c) Contraction d) Relaxation 6) Where does the cardiac conduction system start? a) AV node b) SA node c) Bundle of His d) Purkinje fibers 7) What does cardiac output measure? a) Heart rate b) Blood volume c) Blood flow d) Oxygen level 8) Which disease affects heart arteries? a) Asthma b) Coronary artery disease c) Diabetes d) Arthritis 9) What happens during systole? a) Heart relaxes b) Heart contracts c) Valves open d) Blood fills 10) What is a symptom of heart disease? a) Joint pain b) Chest pain c) Headache d) Fever

Heart Structure and Function Quiz

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