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It is normal for freshly voided urine to contain a significant amount of bacteria.​

Which hormone regulates water reabsorption in the kidneys?

What is the name of the muscular movement that pushes food through the digestive tract?

Which process is the first step in the formation of urine in the nephrons?​

Which organ performs the major role in excreting nitrogenous wastes and excess water from the body?​

Gum infections can lead to serious conditions, such as heart disease.​

Diarrhea can be a life-threatening condition for the very young and the aged.​

The adult alimentary canal, from the mouth to the anus, is about how many feet long?​

Absorption in the small intestine is possible because its lining is smooth.​

Choose one of the following prompts. Write an account from the perspective of one of John Brown’s raiders, a witness, or an opponent during the Harpers Ferry raid.   Or   Write a diary entry from the perspective of a person accused of witchcraft during the Salem Witch Trials, detailing their experience and emotions throughout the trial process.   Or   Write a narrative from the perspective of someone who witnessed—or was directly involved in—the Boston Massacre.