Our heart system

Heart

Our heart is the engine at the center of body's circulation system. It starts working even before we are born- and from then on,it beats constantly, throughout our lives.

Made from a special kind of muscle not found anywhere else in the body, the hardworking heart contracts relaxes about 70 times every minute. This rhythmic pumping pushes essential blood out to the body, then fills the heart up again, ready for the next beat.

Vital supplies 

To keep the heart beating the cells need a constant supply of fuels and oxygen. This is delivered by the coronary blood supply- the heart's own network of blood vessels. Which penetrates the heart's walls to reach the muscles.

Heart rate

The heart rate is the number of beats per minute (bpm) that the heart makes. A person's average heart rate varies according to different factors such as age, gender, and level of fitness. 

●  heart beat of a person according to age

  • Newborn baby = 130 bpm

  • 10 year old = 90 bpm

  • Adult women = 78 bpm

  • Adult man =70 bpm

[ A new born baby's heart is the size of a table tennis ball]

Interesting facts about our heart ~

1. Exercise raises the heart rate but strong emotions such as fear, or excitement also increase it.

2. The "lub-Dub" sound of a heartbeat is made by different valves in the heart closing. 

3. 2.5 billion is the number of times as heart will beat in an average lifetime. 

4. Water makes up about three-quarters so the weight of a human heart.

5. The average adult man's heart weights around 340g (12 ounces) , about the same as a can of soup.