To measure ECG, usually how many electrodes are connected to a patient?

Which of these is not a heart disease?

What is the atrio-ventricular septum made of?

What percentage of blood contains the formed elements?

Which of the following is not secreted by basophils?

What is the minimum blood pressure for hypertension?

Which of these devices is used to hear the heart sounds?

Which of these events coincide with ventricular systole?