Which of the following statement (s) is/are incorrect?
I. The AV node and the bundle of His constitute, the electrical link between the atria and the ventricles
II. The bundle of His is a bundle of electrical nodes which allows the ventricles to contract
III. The bundle of His is a group of fibres that carry the electrical impulses through the centre of the heart
IV. The bundle of His is located in the artrial region
Choose the correct option
You are required to draw blood from patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes.
Which of them will you not use for the purpose?