The portion of heart which is always ready to be the pacemaker if SA node stops working:
Correct answer: B. AV node
- A. Bundle branch
- B. AV node
- C. Ventricle Muscles
- D. Atrial Muscles
Explanation
The atrioventricular node or AV node is a part of the electrical conduction system of the heart that coordinates the top of the heart. It electrically connects the atria and ventricles.
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About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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