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Renal capsule Outer layer of kidney
Renal cortex Superficial reddish area
Renal medulla Deep darker area containing the pyramids and columns
Renal column Area between the pyramids
Minor calyx Each kidney contains 8-18
Major calyx Each kidney contains 2-3
trigone Contains the 2 ureteral openings
Prostatic urethra Portion of the urethra that passes through the prostate
Membranous urethra Intermediate and shortest section of the male urethra
Penile urethra Portion of the urethra that passes through the penis
Internal urethral sphincter
External urethral sphincter
RENAL BLOOD SUPPLY
Segmental artery Renal artery divides and each segmental artery supplies one renal region
Interlobar artery Blood vessels that pass through the columns between the pyramids
Arcuate artery Blood vessels that form an arc between the cortex and the medulla
Interlobular artery Branch from arcuate arteries to enter the cortex
Afferent arteriole Branches from interlobular arteries and is where blood enters glomerulus
Efferent arteriole Blood exits glomerulus
Peritubular capillaries efferent arterioles divide to surround portions of the nephron in the cortex
Vasa recta Some efferent arterioles have long loop-shaped capillaries that surround portions of the nephron in the medulla
Interlobular vein Peritubular capillaries reunite to form interlobular veins Interlobular veins also receive blood from the vasa recta
Arcuate vein Receives blood from the interlobular veins
Interlobar vein Pass through the renal columns and receives blood from arcuate veins
Segmental vein Receives blood from the interlobar veins
Nephron Contains one renal corpuscle and its renal tubule
Renal corpuscle Lies in the cortex and contains -Glomerulus -Bowman’s Capsule
Glomerular (Bowman’s) capsule Double walled epithelial cup that surrounds the glomerulus
Visceral layer of Bowman’s capsule Nucleus of podocyte
Proximal convoluted tubule (PCT) (orange twisted) Portion of renal tubule that lies in the cortex and is attached to the glomerulus and coiled
Loop of Henle Also called a nephron loop Extends into the medulla, makes a hairpin turn, and returns to the cortex
Descending limb Portion of the nephron loop that descends from the PCT into the medulla (orange straight)
Ascending limb (purple straight) Portion of the nephron loop that ascends from medulla and returns to the cortex, attaching to the DCT
Distal convoluted tubule (DCT) Portion of renal tubule that lies in the cortex and is attached to the collecting duct and coiled (purple twisted)
Collecting tubule (duct) Several DCTs drain into one collecting duct
Juxtaglomerular apparatus (JGA) Afferent arteriole Distant Convoluted Tubule Regulates arterial blood pressure and the rate of blood filtration by the kidneys
Macula densa Tall crowded cells on the wall of the distal convoluted tubule that monitor ion concentration of the fluid passing through
Juxtaglomerular cells In the wall of the afferent arteriole These are modified smooth muscle fibers
Types of nephrons
cortical Cortex Medulla Nephrons that have a short loop of Henle and glomeruli in the superficial region of the cortex 80-85% of nephrons
juxtamedullary Cortex Medulla Nephrons that have glomeruli in the cortex close to the medulla and a long loop of Henle that spans the medulla 15-20% of nephrons
Lab Ex 56 & 58: Urinary System. KIDNEY Renal capsule.
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The Urinary System. Functions of the urinary system Homeostatic regulation of blood plasma Regulating blood volume and pressure Regulating plasma ion.
Ch 26: Urinary System Objectives Identify and describe the components of the urinary system and their function Describe the (histological) organization.
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Renal capsule Renal column Interlobar artery Interlobar vein Renal sinus (cavity in which renal pelvis is found) Papilla of renal pyramid Arcuate artery.
1 Urinary System Objectives 1. Identify organs belonging to the urinary system 2. Describe the gross and microscopic structures of the kidney 3. Describe.
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Urinary System. URINARY SYSTEM Two kidneys Two ureters Bladder Sphincter Urethra Filtration blood and separates toxic substances Regulation of the blood.
Renal pelvis Renal cortex Renal medulla Minor calyx Renal column Renal pelivs Ureter Renal papilla Major calyx Renal pyramid Renal capsule Nephrons.
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