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If a human red blood cell takes the shortest possible route from the right ventricle to the right atrium, then it must travel through this number of capillary beds.

You are an EMT that is working at a parade on a hot day. There is a college marching band getting ready for their performance. The director gets everyone lined up and begins a one hour warm up where everyone is required to stand in place during the warm up. Toward the end of the warm up, you receive a call that a few members of the band have fainted from standing at attention for the long practice. The members all play different instruments and seem to have normal temperatures, normal blood pressures and only complain of being light headed before the fainting but otherwise feel fine now. What is the simplest and most likely explanation for the fainting?

As you are analyzing the blood sample of a human patient, you note an abnormally high number of erythrocytes.  Predict the effects of this situation.

The outer layer of the mammalian kidney is the _____, and the inner layer is the _____.

The excretory structures of annelids are referred to as

The outer layer of the mammalian kidney is the _____, and the inner layer is the _____.

The “lub” heart sound represents ____.​

If a human red blood cell takes the shortest possible route from the right ventricle to the right atrium, then it must travel through this number of capillary beds.

The excretory structures of annelids are referred to as

All of the following are methods used to exchange heat with the environment except