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It is normal and harmless for that to happen from time to time. It is just because just about all of the tissues of the heart can trigger a heart beat and ocassionally they do.

If it is happening a lot it usually means that there is something wring with that muscle. It might not be getting enough blood or there might be scar tissue or an infection or any one of a number of other causes.

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15y ago

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What separates the upper and lower chamber?

The AV valves separate the upper and lower chambers of the heart. The bicuspid valve is on the left, and the tricuspid on the right.


On each side of the heart a value allows blood to travel from the upper chamber to the lower chamber why is this important?

These valves prevent backflow of blood, ensuring that it moves in one direction through the heart. This helps to maintain proper circulation and ensures that oxygen-rich blood is efficiently pumped to the rest of the body.


Air moves from where pressure is higher to lower or lower to higher?

Higher to lower.


Why did the dye move toward the respiration chamber and not away?

The dye likely moved towards the respiration chamber due to the difference in concentration gradient. The dye molecules will naturally diffuse from an area of higher concentration (where the dye is added) to an area of lower concentration (the respiration chamber) in order to achieve equilibrium.


Why does the heartbeat of mammals's make a sound?

In all mammals, the heart is double pump. Each side of hte heart has an upper and lower chamber. The top chamber are called atriums and lower chamber are called ventricles. A one way flap called a valve connects the upper and lower chambers. when the heart muscle relaxes, blood flows through the open valves from the atriums into the ventricles. when the heart contracts, the flap is closed with a thump. the valve prevents the blood from moving back into the the atrium, and it is forced out of the heart through another opening. The sound from the valves can be heard through the tissues of the body and is often described as a lub-dub sound. I hope this helps everyone my son did this project for his science fair at Pioneer Academy of Science, Clifton NJ . Great project