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Urinary System

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Introduction

Cellular metabolism produces wastes

CO₂
Urea
Ammonia

Kidneys rid the body of most nitrogenous wastes
Kidneys regulate the chemical make-up of blood

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General Functions

Serves as a blood filter
Toxins, metabolic wastes leave the body in urine
H₂O, glucose, and amino acids are returned to blood

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Organs of the Urinary system

Slide 15.2

Kidneys
Ureters
Urinary bladder
Urethra

Figure 15.1a

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kidneys

ureters

bladder

urethra

sphincter

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Nephrons

Slide 15.8

The structural and functional units of the kidneys
Responsible for forming urine
Main structures of the nephrons

Glomerulus
Renal tubule

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What blood vessel enters the glomerulus?

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A Typical Nephron

Human Anatomy, 3rd edition

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Ureters

Slide 15.20

Slender tubes attaching the kidney to the bladder

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Urinary Bladder

Slide 15.21a

Smooth, collapsible, muscular sac
Temporarily stores urine

Figure 15.6

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Urethra

Thin-walled tube that carries urine from the bladder to the outside of the body by peristalsis