n the proximal convoluted tubule and are destined to be excreted. The collecting duct is the final tube that takes the waste material that have not been reabsorbed towards the center of the kidney where they will be dumped. If the kidneys are not functioning properly they will not reabsorb water properly which will result inn dehydration.
             Some diseases that affect the digestive tract are cirrhosis of the liver (portions of the liver enlarge then shirk then harden. This is then replaced by scar tissue.) gallstones (bile so concentrated that it solidifies) and peptic ulcers (inflammation and death of the membranes covering the intestinal walls of the stomach.).
             The circulatory system is a complex system that involves the heart, blood vessels, arteries, veins, arterioles, aorta, capillaries, venules, and the vena cava. These are all crucial to the pumping of blood to where it needs to get. In order to maintain a good circulatory system, the body has blood pressure sensors (baroreceptors, chemoreceptors and osmoreceptors) along with cardiac, va
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