大连医科大学：《组织胚胎学》课程教学课件（英文讲稿）16.Urinary system

Urinary system

Urinary system

Componentskidney : produce urineureterscavity organs,bladderconduct,storeandremovethe urineurethraFunctions:RemovemetabolicwasteproductsMaintainthehomeostasisSecrete :renin,erythropoietin2

Components • kidney : produce urine • ureters • bladder • urethra cavity organs, conduct, store and remove the urine 2 Functions: • Remove metabolic waste products • Maintain the homeostasis • Secrete :renin,erythropoietin

KidneyGeneralstructureCapsuleParenchyma = cortex + medulla3

Kidney General structure 3 • Capsule • Parenchyma = cortex + medulla

cortexmedullaryrenal columnpyramidrenal papillaminor calyxmajor calyxmedullary raycortical labyrinthrenal pelviscapsuleureterRenallobeRenallobule

cortex medullary renal column pyramid minor calyx major calyx renal papilla medullary ray 4 capsule ureter renal pelvis cortical labyrinth Renal lobe Renal lobule

CORTEX

CORTEX 5

MEDULLA

MEDULLA 6

distaloonvolutedtutbuleglomerudusptoximalconvolutedtubuleCBOSERsection enlargedmedularyat rightpyramimacula densacortexParencymacortexrenal.of kidneypelvismedillarymedulary rayrays(containsontcontainsstraight tubules)collecting tubuleureternumerousuriniferousascendinganddescendingtubules,limbsofloopsof Henlewhicharecomposedofduct ofBelinimedullanephronsandcollectingpapllacorticallabyrinthtubules.Figure19.6.Diagrams and photomicrograph (x60)of an adult humankidney.7

Parencyma of kidney contains numerous uriniferous tubules, 7 which are composed of nephrons and collecting tubules

I. NephronDistal convolutedProximalcovolutedHonaltubuletubulecorpuscleThe structural andfunctional unit ofkidney.Cortexrenal corpuscle+tubuleCoillecting tubule frorThick descending limbadjacentnephronHenle'sloopa.renal corpuscleThick ascending limbMedullaglomerulus +ThinlimbglomerularCollecting ductcapsuleb. renal tubuleproximal convolutedtuhules8Papilla+ thin and thick limbs

I. Nephron The structural and functional unit of kidney. renal corpuscle + tubule 8 a. renal corpuscle glomerulus + glomerular capsule b. renal tubule proximal convoluted tubules + thin and thick limbs Distribution

DistaltubuleMaculadensa1.RenalcorpuscleofdistaltubuleAfferentEfferentarteriolearteriolevascularpole + urinaryJuxtaglomerularpolecells(modifiedVascularpolesmoothmuscle)Bowman'sBowman'scapsule1)Glomeruluscapsule(visceral(parietallayer)layerpodocytes)afferentarteriole:thick,Parietallayershortcap.network:fenestratedUrinaryspaceUrinarypolecap.noProximalBrushborderconvoluted(microvilli)diaphragmtubuleefferent arteriole: thin

1. Renal corpuscle vascular pole + urinary pole 1) Glomerulus afferent arteriole: thick, 9 short cap. network: fenestrated cap. no diaphragm efferent arteriole: thin, long

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