The Heart

The hearts’ approximate size in an adult is two fists. The heart is located at the centre of the chest, but leaning to the left. It stops at the left nipple. That’s a bit different with a woman because of… Well, you know. The heart has four chambers. Two atria (or atriums, both possible in English, I looked it up) , two ventricles. The left atrium fills with blood and then the blood flows into the left ventricle. The tricuspid valve keeps the blood from flowing back to the atrium. The tricuspid valve is kept at place by heart strings. Those are elastic strings attached to the wall of the ventricle. Then the blood is pumped through the pulmonary valve. It goes to the lungs to pick up air and then goes back to the heart, through the mitral valve. The right ventricle contracts, pushing the blood through the aortic valve. Then the blood goes to the head and the other organs to give blood and the process renews.

The heart , some facts.
- A resting adult’s heart beats 60 – 100 times a minute.
- The heart of a child beats about 120 times a minute.
- The most common heart problem is a hole in the atrium of the heart.
- This are the names of the valves. First valve, left heart : Aorta valve.
second valve, left heart : Mitralis valve.
First valve, right heart: tricuspid valve.
second valve, right heart: pulmonary valve.
- The heart is surrounded by the pericardium.
- The space between the heart and the pericardium is filled with a little bit of water. This keeps the two from rubbing together.
- The coronary artery supplies the heart with food and oxygen.
- The heart doesn’t need the brains to decide things. The heart works automatically.

© Eva de Schipper, B2a

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