The Urinary System

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The Urinary System
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The Urinary System

• Homeostasis
• Excretion
• Water-salt balance
• Acid-base balance
• Secretion of hormones

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The Urinary System

• Metabolic wastes
• Urea
• Creatinine
• Uric acid

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Anatomy of the Urinary System

• Kidneys

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Anatomy of the Kidney

• Regions
• Cortex
• Medulla
• pelvis

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The Nephron

• Vascular
• Afferent arteriole
• Glomerulus
• Efferent arteriole
• Peritubular capillaries
• Tubular
• Glomerular capsule
• Proximal tubule
• Loop of Henle
• Distal tubule
• Collecting duct

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Anatomy of the Urinary System

• Ureters
• Mucosa
• Muscle
• Connective tissue

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Anatomy of the Urinary System

• Urinary Bladder
• Mucosa
• Detrusor muscle
• Middle -circular
• Two layers - longitudinal
• Sphincters
• Internal
• External

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Anatomy of the Urinary System

• Urethra
• males
• 20 cm
• Urine / sperm
• females
• 4 cm

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The Urinary System

• Micturition
• Urination
• Stretch receptors

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Urine Formation

• Glomerular Filtration

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Urine Formation

• Reabsorption

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Tubular Secretion

• Blood to filtrate

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Regulatory Functions

• Fluid and Electrolyte Balance
• H2O intake H2O loss
• Liquids
• Foods
• By-product of metabolism
• Urine
• Sweat
• Exhaled air
• Feces