Circulatory

are they effected by caffeine?

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... low O2 more fitly than other fish could. I'm not sure they would be less fit in highly oxygenated waters. That has to do with how a lungfish's circulatory system works. Internal flaps in the heart help to direct blood flowing out of the heart first to the lungs where it is oxygenated. Blood ...

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... seems all I did was talk about which structure does which function. I was asked to relate the structure to function of the following body systems: Circulatory ststem Digestive System Nervous System and Respiratory system Can someone help me to RELATE the structure to function for theses systems ...

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... nervous system, since there are no organs or structures beyond just nerves in the cavities - but by your definitions, then you'd have to include circulatory. If you consider the liver part of the circulatory system, circulatory could work, though.

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... increases (at the constant blood volume). But organisms regulate blood pressure by reduction of blood volume or by increasing total volume of circulatory system (changing diameter of blood vessels). So blood volume is directly proportional to blood pressure. Others questions are very easy ...

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