Multiple choice

Which of the following lies in the deepest layer of the endocardium and supplies the papillary muscles of the human heart?

  1. Purkinje fibres

  2. Atrioventricular node

  3. Sinoatrial node

  4. Bundle of His

  5. Bundle branch block

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Purkinje fibres lie in the deepest layer of the endocardium and supply the papillary muscles. Hence, the apex of the heart contracts first, followed by the papillary muscles.