The nephron is the basic part of the kidney. It removes excess water, wastes, and other substances from your blood. Sodium, potassium or phosphorus are returned whenever they run low in the body. The parts of the nephron are the Bowman's capsule that is located in the cortex. Next to it is a twisted region is the proximal tube. After this tube is the loop of Henle, it extends from the cortex down the medulla and back. The second twisted region of the nephron is called the distal tubule, located in the cortex as well. The collecting dust is the open end of the nephron that extends from the cortex all the way through the medulla. The kidney regulates the blood in the three processes. First it filters 20% of the plasma from the blood into inside of the nephron. Next, it reabsorbs the items the body needs from the lumen back into the blood. Lastly it secretes some unwanted items from the blood into the lumen of the nephron. The counter current in the kidney occurs in the loop of henle. The contercurrent flow is similar to the nephron because it works with water as well. The main difference is that counter currents allow water to be reabsorbed into the body while the nephron works to remove the excess water brought in the kidney by the counter currents.
http://science.howstuffworks.com/environmental/life/human-biology/kidney.htm
http://www.shodor.org/master/biomed/physio/dialysis/kidney.htm
http://www.renalinfo.com/us/how_kidneys_work_and_fail/kidney_functions/index.html
Kidney Functions Mindmap |
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