Urinary System

adrenal glands – produce hormones renal artery 1. Kidneys produce urine. renal vein aorta Inferior vena cava 2. Ureters transport urine. 3. Urinary bladder stores urine. 4. Urethra passes urine to outside.

Excretion of metabolic waste Maintain salt/water balance Maintain acid/base balance Contribute to hormonal function

Renal pyramid in renal medulla ureter renal pelvis renal cortex renal artery renal vein ureter a. Blood vessels renal cortex renal pelvis ureter renal pyramid in renal medulla b. Gross anatomy, photograph

renal pelvis collecting duct renal medulla cortex nephrons Renal pyramid in renal medulla ureter renal pelvis renal cortex

Fig. 10.5b nephrons cortex collecting duct proximal convoluted tubule renal pelvis collecting duct renal medulla cortex nephrons proximal convoluted tubule glomerulus And podocytes glomerular capsule efferent arteriole afferent arteriole collecting duct renal artery Renal Cortex Renal vein venule Renal Medulla Fig. 10.5b descending limb peritubular capillary network loop of the nephron ascending limb

Glomerular filtration Tubular reabsorption Tubular secretion Role of Nephron in Urine Formation Glomerular filtration Tubular reabsorption Tubular secretion

180 L 1.5 L

Increasing solute concentration in renal medulla H 2 O Inner medulla loop of the nephron collecting duct descending limb Renal cortex Outer NaCl ascending H2O Increasing solute concentration in renal medulla urea

capillary HCO3– H+ Kidney tubule HCO3– H+ + NH3+ NH4 +