Question

heart valves and pumps lab experiment

What happened when you pressed on the balloon stretched over the jar? What structure in this experiment mimics a heart valve? How did valve influence the experimental results? If possible, indicate the differences in water displaced (in ml) with valve versus without the Valve. Does the valve enhance water flows? Why?

please help

Answer 1

On pressing the balloon that is stretched over the jar, it stops the water from going back down the straw and hence it resembles the function of the pumping heart. It basically prevents the backflow of the water from the straw upon pressing the balloon that is cut and stretched over the bottle or jar.

The structure that mimics the valve of the heart in this is the end cut of the balloon that is stretched across the jar. This acts or mimics the valve which stops the backflow of the heart and hence helps in pumping out the blood from atrium.

The valve has influenced the result as it helps in identifying and analyzing how the heart beats or pumps and shows how the balloon acts similar to the artery. Through the experiment it can be analyzed that the valve can be used for keeping the blood being pumped from one chamber to another but if the balloon is taken off, it will pump out water from the straw. This means that valve is important and it keeps the water from going back and hence shows importance of how valves separates the heart chambers.