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Nephron Microscopic Anatomy (view source)
Revision as of 13:24, 3 September 2008
, 13:24, 3 September 2008no edit summary
Vasa Recta is the name given to blood vessels supplying the medullary region of the kidney. They are arranged in a U configuration but flow is opposite to that of the [[Loop Of Henle - Anatomy & Physiology | Loop of Henle]]. The blood vessels descend from the cortex down into the medulla. Its supplies the nutrients and oxygen the [[Loop Of Henle - Anatomy & Physiology | Loop of Henle]] needs.
Vasa Recta is the name given to blood vessels supplying the medullary region of the kidney. They are arranged in a U configuration but flow is opposite to that of the [[Loop Of Henle - Anatomy & Physiology | Loop of Henle]]. The blood vessels descend from the cortex down into the medulla. Its supplies the nutrients and oxygen the [[Loop Of Henle - Anatomy & Physiology | Loop of Henle]] needs.
==The Distal Tubule==
[[Image:proxdisttub.jpg|right|thumb|200px|<small><center>Histology section of renal tubules (© RVC 2008)</center></small>]]
* Consists of two parts
** Straight part - connects the thick ascending limb of the loop of henle to the convoluted distal tubule
** Convoluted part - connects the straight part to the connecting duct
* No brush border - very few micro villi (compared to the [[Proximal Tubule - Anatomy & Physiology#Anatomy | Proximal Tubule]]))
* The basal lamina is striated to increase the surface area for reabsorption
==Collecting Duct==
* This structure links the distal tubule to the area cribosa of the papilla into the renal pelvis
* Here the final concentration of the urine occurs as the collecting duct makes the transition from the isotonic cortex to the hypertonic medulla the increasing osmolarity of the interstial fluid causes more and more water to be reabsorbed.
* The collecting duct has 2 cell types
** Intercalated cells
** Principal Cells
* The cells are flat to cylindrical
* Have clearly visible cell borders