Read the following statements carefully.
(i) In fishes, the heart pumps out deoxygenated blood which is oxygenated by the gills and supplied to the body parts from where deoxygenated blood is returned to the heart.
(ii) The openings of the right and the left ventricles into pulmonary artery and aorta respectively are provided with the mitral valves.
(iii) The nodal musculature has the ability to generate action potentials without any external stimuli, i.e., it is autoexcitable.
(iv) The T-wave of ECG represents depolarisation of the ventricles.
Which of the above two statements are incorrect?
Text Solution
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Purkinje fibres arise from apex of ventricles. The right and left bundle of ventricles branches to give rise to minute fibres throughout the ventricular musculature of the respective sides and are called purkinje fibres.
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