Hello kindhearted people! Todays topic is... heart beats.
An average human heart can beat three billion times in a lifetime. When you're feeling your heart beating/pumping that's your heart contracting and relaxing. When your heart contracts, it tightens. Each time it contracts it's pumping blood, and that's your heart beat. When you feel your heart beating, that's your pulse.
If you were doing something like running/jogging, walking, jumping, climbing or swimming, your heart rate increases. Why is our heart beating so much faster when we exercise? Your heart needs to work faster and harder to get more oxygen to your muscles to help them work efficiently.
• Giraffes have lopsided hearts. Here's why: a giraffes left ventricle is bigger and thicker than its right ventricle
• Your heart beats on average 115,000 times in one day