Basic Anatomy of the Heart

In regards to the coronary heart

The guts is the toughest working muscle within the human physique. The guts is positioned nearly within the heart of the chest. The grownup human coronary heart is concerning the measurement of a fist.

At relaxation, a traditional coronary heart fee for adults is 60 to 100 beats per minute. In a well-trained athlete, the resting coronary heart fee will be wholesome at a fee of 40 to 60 beats per minute. With train, the center beats quicker and the center fee will increase to get extra oxygen to the muscle mass.

How the center works

The cardiovascular system is made up of the center and blood vessels. Its job is to flow into blood all through your physique. The blood brings oxygen and vitamins to the tissues.

The guts is made up of:

• 4 chambers (2 atria and a couple of ventricles) that get blue (deoxygenated) blood from the physique. They pump out crimson (oxygen-rich) blood again to it:

  
  

• Blood vessels that embrace a community of arteries and veins that carry blood all through the physique:

  
  

• 4 valves to stop backward circulation of blood:

  
  

• {An electrical} system that serves as a pure pacemaker. It additionally conducts electrical energy to stimulate the center muscle mass to contract. This controls the speed and rhythm of the heartbeat.