Renal pelvis a funnel shaped expansion of the ureter Branching extensions of

Renal pelvis a funnel shaped expansion of the ureter

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Renal pelvis : a funnel-shaped expansion of the ureter - Branching extensions of the renal pelvis form two or three major calices …each of which divides to from several minor calices , cup-shaped tubes that enclose the papillae of the pyramids (… so each pyramid is abutted by a minor calyx)
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Kidneys: Internal Gross Anatomy Renal papillae Minor calyx Major calyx Renal pelvis Ureter Urinary Bladder Urethra Outside of body Flow of urine ( once it is produced by nephrons ): Kidney Ureter Urinary bladder Urethra
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Blood vessels of the Kidney Cortical radiate vein Cortical radiate artery (aka interlobular artery) Arcuate vein Arcuate artery Interlobar vein Interlobar artery Segmental arteries Renal vein Renal artery Ureter Renal medulla Renal cortex Path of blood flow through renal blood vessels Glomerulus (capillaries) Nephron-associated blood vessels Afferent glomerular arteriole Efferent glomerular arteriole Cortical radiate artery Peritubular capillaries and vasa recta Arcuate artery Interlobar artery Segmental artery Renal artery Aorta Inferior vena cava Renal vein Interlobar vein Arcuate vein Cortical radiate vein
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Microscopic Anatomy of the Kidneys: THE NEPHRON
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A nephron is the basic structural and functional (urine-producing) unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances (like sodium salts) by filtering the blood, resorbing what is needed and excreting the rest as urine Kidneys: The Nephron
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Nephrons are composed of: … a collecting duct that receives urine from several nephrons; involved in concentrating urine by removing water from it. Renal cortex Renal medulla Renal pelvis Ureter Kidney Renal corpuscle Glomerular capsule Glomerulus Distal convoluted tubule Proximal convoluted tubule Cortex Medulla Thick limb Thin limb Nephron loop Descending limb Ascending limb Collecting duct 1) A renal corpuscle - a tuft of capillaries called a glomerulus plus a glomerular capsule surrounding the capillaries 2) A renal tubule – a convoluted, continuous tubule consisting of THREE portions that ends in …. The Nephron • The whole length of the nephron is lined by a simple epithelium that is adapted for various aspects of the production of urine
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Nephrons produce urine through three interacting mechanisms: Mechanisms of Urine Production 1) Filtration : a filtrate of the blood leaves the glomerular capillaries (glomerulus) and enters the nephron. 2) Resorption : most of the nutrients, water, and essential ions are recovered from the filtrate and returned to the blood of capillaries ( peritubular capillaries or vasa recta ) in the surrounding CT 3) Secretion : Remaining wastes (in blood) are moved into tubule from surrounding capillaries Afferent glomerular arteriole Glomerular capillaries Efferent glomerular arteriole Glomerular capsule Renal tubule & collecting duct containing filtrate Peritubular capillary To cortical radiate vein Cortical radiate artery Urine 2 3 3 1 Glomerular filtration Tubular resorption Tubular secretion Three major renal processes: 2 3 1 1 2 3
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