BIO 102 Lecture Notes - Lecture 18: Proximal Tubule, Renal Vein, Solution

10 views5 pages

Document Summary

Regulate composition of the blood and extracellular fluids, the watery substance that bathes all cells. Helps control the osmolarity in dissolved substances in cells and their extracellular environment: excretion: removal of unwanted substances from the body. Urine contains the waste products of cellular metabolism. 3 basic processes : blood or extracellular fluid is filtered, removing water and small dissolved substances, nutrients are selectively reabsorbed back into the filtered fluid, excess water, excess nutrients, and dissolved wastes are excreted from the body in urine. Kidneys: paired organs of the vertebrate urinary system located on either side of the spinal column where blood is filtered and urine is produced; face different challenges in maintaining homeostasis. Glomerulus: dense knot of capillaries where fluid is filtered out of the blood through the capillary walls. Tubule: long and twisted tube where urine formation occurs. Bowman"s capsule: chamber surrounding glomerulus that receives fluid filtered out of the blood from glomerular capillaries.