Kidney Filtration and Function for Homeostasis
Explore the fascinating process of kidney filtration through engaging visuals and detailed explanations. Learn how kidneys function to maintain homeostasis by removing waste, regulating water levels, adjusting substance concentrations, and filtering blood. Discover the components of blood that should be removed by the kidneys and those that should not be in urine. Dive into the essential role kidneys play in keeping our bodies balanced and healthy.
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Presentation Transcript
Objectives Determine how kidneys function Identify components of the blood that should be removed by the kidneys Identify components of blood that should not be present in the urine
What Do Kidneys Do? Maintain HOMEOSTASIS Remove UREA and other waste Regulate the amount of WATER in the blood Adjust the CONCENTRATION of other substances in the blood Send FILTERED blood back throughout the body
Blood Components The following items are found in the bloodstream: Water Red Blood Cells White Blood Cells Glucose Protein Amino Acids Salt Urea
Blood Components As blood goes through the kidneys, some components of blood are Kept: because they are ESSENTIAL for life functions Removed: and EXCRETED in the urine because they are TOXIC Balanced: so they are present in the correct AMOUNT in the blood COMPLETELY reabsorbed (KEEP them all) SELECTIVELY reabsorbed (KEEP a certain amount as needed)
Blood Components Blood Component Water Action Taken By Kidneys Balanced (Selectively Reabsorbed) Kept Kept Balanced (Completely Reabsorbed) Kept Balanced (Completely Reabsorbed) Balanced (Selectively Reabsorbed Removed Red Blood Cells White Blood Cells Glucose Protein Amino Acids Salt Urea
How Kidneys Work Blood enters the kidneys through the RENAL ARTERY Blood branches out to small capillaries (called GLOMERULUS) Big particles stay in the blood Red Blood Cells White Blood Cells Proteins Small particles go into a holding area (called the NEPHRON)
How Kidneys Work The material in the nephron is called FILTRATE The body REABSORBS some (selectively) or all (completely) of the materials required for homeostasis The remaining filtrate is sent to the bladder as URINE
