The Excretory System 14 Lesson 14.1: Anatomy of the Kidney Lesson 14.2: Urine Formation, Storage, and Excretion Lesson 14.3: Diseases and Disorders of.

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The Excretory System 14 Lesson 14.1: Anatomy of the Kidney Lesson 14.2: Urine Formation, Storage, and Excretion Lesson 14.3: Diseases and Disorders of Excretory System

Kidney Location and Size

Anatomy of the Kidney renal cortex renal medulla renal pelvis outer middle renal pelvis Inner (drainage area)

Anatomy of the Kidney renal medulla pyramid columns ureter bladder

Nerve and Blood Supply 20–25% of blood flows to kidneys renal artery renal vein sympathetic nerve system renal nerve fibers

The Nephron basic working unit of each kidney two main parts renal corpuscle glomerulus renal tubule

Blood Flow through the Kidneys renal artery afferent arteriole glomerulus efferent arteriole peritubular capillaries or vasa recta renal vein

Urine Formation, Storage, and Excretion Chapter 14: The Urinary System Lesson 14.2 Urine Formation, Storage, and Excretion

Urine Formation filtration reabsorption secretion water and solutes from capillary to glomerular capsular space reabsorption water and solutes move from tubule to capillary secretion wastes in capillary pushed into tubule

Urine Formation

Reabsorption

The Renal Medulla nephron loop (loop of Henle) descending loop reabsorb water ascending loop reabsorb sodium

Hormonal Regulation of Urine Volume and Composition aldosterone renin reacts & produces angiotensin atrial natriuretic peptide causes urine volume to increase antidiuretic hormone causes urine volume to decrease

Urine Storage ureter bladder urethra kidney to bladder stores urine bladder to outside body

Urine Storage

Urine Excretion micturition urination

Assessing Renal Function Urine- pH range 4.5–8.0 95% water, 5% waste glomerular filtration rate estimate with creatinine in blood

Chronic Kidney Disease kidney damage filtration rate under 60 ml/min for at least 3 months develops slowly

Renal Dialysis hemodialysis peritoneal dialysis dialyzer dialysis solution peritoneum acts as dialysis membrane Done at home

Diabetes diabetes mellitus diabetes insipidus glucose in urine type I, type II diabetes insipidus large amount of dilute urine ADH not made or not used

Diseases and Disorders of the Urinary System kidney stones calcium, magnesium, or uric acid urinary tract infection Cystitis-bladder inflammation more common in women than men

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