How Does the Heart Work Video for Kids

                                           How the Heart works

Human heart can be described as an organ that pumps blood throughout the body, supplies oxygen and all other nutrients to the tissues and removes carbon dioxide and other wastes. It is roughly the size of a large fist and weighs anywhere from 10 to 12 ounces in men and 8 to 10 ounces in women.

There are three layers that make up the heart: –

• Pericardium: – It is the thin outer protective sack.
• Myocardium: – It is composed of specialized cells that make up the thick muscular wall.
• Endocardium: – It is the thin inner lining of the heart.

There are four chambers inside the heart: – two on the left side and two on the right side. The small upper chambers are known as atria and the two larger lower chambers are known as ventricles.

A muscular wall called septum divides the left side and the right side of heart. There are four valves. Two of them are located in the right side, known as tricuspid valve and pulmonary valve. Rest two are located in the left side, known as mitral valve and aortic valve.

Blood that leaves the heart is carried through arteries and that goes towards the heart is carried through veins. Not having proper sleep can cause premature ventricular contractions, a condition of irregular jumping heartbeats.

Quick Facts: –

• Heart attacks cause scar tissue to form amongst normal heart tissue.
• Human heart is located in our chest and well protected by the rib cage.
• The study of human heart and its various orders is known as cardiology.