||The main artery that receives blood from the left side of the heart
and circulate it through the rest of the body. The blood in aorta is rich in oxygen and will appear bright red.|
||This artery carries blood from right side of the heart to the lungs for oxygenation.
As the blood passes through small blood vessels in the lungs, it will take up oxygen.|
||These are small arteries running on the surface of the heart, supplying the
heart muscle with oxygen and nutrients. There are usually three main coronary arteries supplying the heart.|
||Also called myocytes. These muscle cells pumps blood in and out of the heart
during its contraction. If the muscles are weak, heart failure results.|
||These veins, return poorly oxygenated blood from the body to the right side
of the heart. Blood from upper parts returns via SVC (superior vena cava) and from the lower parts via IVC (inferior vena
The heart weighs about 350 to 450 grams in an average
It pumps about 80 cc of blood per heart beat. At average heart beat of 70 per minute, in a day, the heart would
have pumped 8 thousand liters of blood around the body.
It is on automatic. Via specialised group of cells, the heart
has a natural pacemaker that will regulate the heart rate.
Some specialised muscle cells act as a conducting pathway,
much like electrical circuit. Signals from the pacemaker is transmitted to heart muscle in orderly fashioned.
valves separate the various chambers and great blood vessels. Acting like a door, it allows blood flow only in one direction.
There are four valves in a normal heart.
Coronary arteries are special blood vessels running on the surface of the
heart. They supply nutrient-rich blood to the hardworking heart muscle. A narrowing or blockage of these arteries causes heart
attacks and coronary artery disease.
Major risk factors for coronary artery disease are:
Exercises increase the
demand on circulatory system and condition it in the long run to work more efficiently. Walking, light jogging, swimming or
cycling for 30 to 40 minutes at least three times per week is recommended.
- High cholesterol level
- High blood pressure
- Diabetes mellitus
- Family history
Heart disease could be silent in the early
stage. It may be worthwhile to undergo routine physical examination and stress test, especially if you are above 45.
and healthy lifestyles are important preventive measures. Regular exercise, keeping optimal body weight, good balanced diet
and stress reduction are important.