You are watching a horror movie and you notice that your heart is beating fast and mouth is dry. It is because of

How you noticed that you are growing?

You heared a rhythmic sound from your heart after running. That means you know that your heart is beating. Then how will your pulse be?

What do you notice? What happens to your breath as you try to swallow

How can you maintain your heart healthy? Write in brief.

The heart keeps on beating throughout the lift without faigue because :