What is heart ?

What is heart

a hollow muscular organ of the body that expands and contracts to move blood through the arteries and veins

What is the heart of a human?

The heart is a fist-sized organ that pumps blood throughout your body. It's the primary organ of your circulatory system. Your heart contains four main sections (chambers) made of muscle and powered by electrical impulses. Your brain and nervous system direct your heart's function.

What are the 4 parts of the heart?

The heart is made up of four chambers: two upper chambers known as the left atrium and right atrium and two lower chambers called the left and right ventricles. It is also made up of four valves: the tricuspid, pulmonary, mitral and aortic valves

four main function of heart

• Pumping oxygenated blood to the other body parts.
• Pumping hormones and other vital substances to different parts of the body.
• Receiving deoxygenated blood and carrying metabolic waste products from the body and pumping it to the lungs for oxygenation.
• Maintaining blood pressure.
• Location of heart
• Your heart is located in the front of your chest It sits slightly behind and to the left of your sternum (breastbone). Your ribcage protects your heart.
• Function of heart
• The task of your heart is to pump enough blood to deliver a continuous supply of oxygen and other nutrients to the brain and the other vital organs.
• Function of four chambers of heart
• The heart has four chambers: two atria and two ventricles. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.
• cardiac tissue

   
  Muscle tissue: Heart is made up of a special type of muscle tissue termed as cardiac tissue. These are involuntary and striated muscles which help the heart to pump the blood throughout life.

  How many tissues are present in heart?

  The tissues found in the human heart are: Epithelial tissue. Connective tissue. Nervous tissue.

  Anatomy of the heart

  • Left atrium and auricle. Left atrium. Left auricle.
  • Right atrium and auricle. Right atrium. Right auricle.
  • Interventricular septum and septal papillary muscles. Interventricular septum. ...
  • Right ventricle and papillary muscles. Right ventricle. ...
  • Left ventricle and papillary muscles. Left ventricle.

  How the heart works

  The rate at which the heart contracts depends on many factors, such as:

  • activity and exercise
  • emotional factors
  • some medical conditions
  • a fever
  • some medications
  • dehydration

   

  At rest, the heart might beat around 60 times each minute. But this can increase to 100 beats per minute (bpm) or more.

  Left and right sides

  The left and right sides of the heart work in unison. The atria and ventricles contract and relax in turn, producing a rhythmic heartbeat.

  Right side

  The right side of the heart receives deoxygenated blood and sends it to the lungs.

  • The right atrium receives deoxygenated blood from the body through veins called the superior and inferior vena cava. These are the largest veins in the body.
  • The right atrium contracts, and blood passes to the right ventricle.
  • Once the right ventricle is full, it contracts and pumps the blood to the lungs via the pulmonary artery. In the lungs, the blood picks up oxygen and offloads carbon dioxide.

  Left side

  The left side of the heart receives blood from the lungs and pumps it to the rest of the body.

   

  • Newly oxygenated blood returns to the left atrium via the pulmonary veins.
  • The left atrium contracts, pushing the blood into the left ventricle.
  • Once the left ventricle is full, it contracts and pushes the blood back out to the body via the aorta.

  Conclusion

  The heart is an essential, powerful organ that constantly pumps oxygen and nutrients around the body.