1. Urinary System:
Outcome: I can describe the main structures and functions associated with the urinary system.
Drill:
Explain the differences between asthma and emphysema.

2. Urinary System Overview
Two kidneys
Receive 25 percent of the cardiac output
Perform the excretory functions of the urinary system
Produce urine
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3. Urinary System Overview
Urinary system (continued)
Urinary tract includes the:
Ureters—receive urine from the kidneys
Conduct urine to the urinary bladder
Urine moves by both gravity and peristalsis
Urinary bladder—receives and stores urine
Contraction of muscle in walls drives urination
Urethra—conducts urine from the bladder to outside the body
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4. Kidneys Ureters Urinary bladder Urethra Figure 24.1 1
Overview of the urinary system
Kidneys
Ureters
Urinary
bladder
Urethra
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Figure 24.1 1

5. Figure 24.1 2 © 2015 Pearson Education, Inc.

6. Renal papilla Renal pelvis
Major structural landmarks of the kidney
Minor
Calyx
Major
Calyx
Major Structural Landmarks
of the Kidney
Fibrous capsule
Renal cortex
Renal
papilla
Renal
pelvis
Hilum
Renal medulla
Renal pyramid
Ureter
Renal column
Kidney lobe
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© Pearson Education, Inc.
Figure 24.3 1

7. Minor calyx Major calyx Hilum Renal pelvis Ureter Figure 24.3 2
Frontal section of a human kidney
Minor calyx
Major calyx
Hilum
Renal pelvis
Ureter
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© Pearson Education, Inc.
Figure 24.3 2

8. Renal Physiology Overview
Urinary system maintains homeostasis by regulating the volume and composition of blood
Excretes solutes, especially metabolic wastes such as:
Urea
Most abundant organic waste
By-product of amino acid breakdown
Creatinine
By-product of creatine phosphate breakdown in muscles
Uric acid
Formed during recycling of nitrogenous bases of RNA
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9. The Urinary Tract Urinary tract Ureters Urinary bladder Urethra
Paired muscular tubes extending from the kidney to the urinary bladder (about 30 cm)
Retroperitoneal and attached to the posterior abdominal wall
Urinary bladder
Hollow, muscular organ holding up to a liter of urine
Urethra
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10. Renal pelvis Right kidney Ureters Urinary bladder Figure 24.15 1
A pyelogram of the urinary system
Renal pelvis
Right
kidney
Ureters
Urinary
bladder
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© Pearson Education, Inc.
Figure 24.15 1

11. Ureter Urinary bladder Urethra Male Female Figure 24.15 2 – 3
Sectional view of the male and female urinary systems
Ureter
Urinary
bladder
Urethra
Male
Female
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© Pearson Education, Inc.
Figure 24.15 2 – 3

12. The Urinary Tract Urethra
Extends from the neck of the urinary bladder to the exterior of the body
Different lengths and functions in males versus females
Male urethra is longer and transports semen as well as urine
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13. Ureters Trigone Rugae Urethra Figure 24.16 1 Prostate gland (males
Features of the urinary bladder
Ureters
Trigone
Rugae
Prostate
gland
(males
only)
Urethra
© Pearson Education, Inc.
© Pearson Education, Inc.
Figure 24.16 1

14. Conduction and Storage of Urine
Urinary bladder (continued)
Rugae
Folds in the bladder lining that disappear with expansion as the bladder fills
Ureters penetrate posterior bladder wall at an oblique angle
Trigone
Triangular area bounded the entrance to the urethra
Acts as a funnel, channeling urine into the urethra with bladder contraction
© 2015 Pearson Education, Inc.

15. Name three waste products eliminated by the urinary system.
Exit Ticket:
Name three waste products eliminated by the urinary system.