ANAT 261 Lecture : Lab 11. Urinary System.doc
15 Mar 2012
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Document Summary
General urinary system review (includes some notes from class) Consists of kidneys, ureters, urinary bladder, and urethra. Functions: regulation of total body water, maintenance of ionic balance, excretion of soluble metabolic wastes, secretion of hormones (renin and erythropoietin) Function: filter the blood: allow for the excretion of wastes, recycling of useful substances. The collecting tubules and collecting ducts of bellini form from the dct. They are not part of the nephron! Area cribrosa: opening of the collecting ducts into the minor calices of the kidney. Transitional epithelium: characterized by facet/dome cells (bulgy, polygonal shaped surface cells, able to expand, depending on the amount of urine. Around kidney (enters at hilus & separates kidney into lobes) Urine empties into minor calyses, then major calyses. Blood enters @ afferent arteriole of vascular pole; exits via e. a. Have brush border, mv disintegrated will look like dirt. Cells: cuboidal with taller columnar cells at macula densa.
