1. Tardigrade
  2. Question
  3. Biology
  4. Read the following statements and select the correct ones. (i) Nodal tissue is specialised cardiac musculature in human heart which has the ability to generate action potential due to an external stimuli. (ii) Position of SAN - right corner of right atrium (iii) Position of AVN - right corner of ventricle (iv) AV bundle continues from AVN (v) Purkinje fibres are modified cardiac muscle fibres that originate from the atrioventricular node and spread into the two ventricles.

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Q. Read the following statements and select the correct ones.
(i) Nodal tissue is specialised cardiac musculature in human heart which has the ability to generate action potential due to an external stimuli.
(ii) Position of $SAN$ - right corner of right atrium
(iii) Position of $AVN$ - right corner of ventricle
(iv) AV bundle continues from $AVN$
(v) Purkinje fibres are modified cardiac muscle fibres that originate from the atrioventricular node and spread into the two ventricles.

Body Fluids and Circulation

Solution:

The nodal musculature has the ability to generate action potential without any external stimuli i.e., it is autoexcitable. $AVN$ is located in the lower left corner of the right atrium close to the atrio-ventricular septum.