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Lecture 24
Urinary System
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Urinary System Anatomy
Anterior
Kidney
Ureter
Stomach
Pancreas
Large intestine
Abdominal aorta
Renal vein
Renal artery
Liver
Inferior vena
cava
Right kidney
Renal hilum
Fibrous capsule
Spleen
Urinary
bladder
Urethra
(a) Anterior view
Fat
Rib
Left kidney
Posterior
Fig. 27.2
Fig. 27.1
External Anatomy of Kidneys
•Renal capsule
–surrounds each kidney
•Hilum
–________________________and nerves enter and ____________________
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and ureter exit kidneys
Internal Anatomy of Kidneys
• Renal cortex: Outer area
– Renal columns
• Renal medulla: Inner
area
– __________________
• Calyces
Fig. 27.3
– Minor: Collects urine
from individual renal
pyramid
– Major: Converge to
form ______________
• ___________________:
Functional unit of
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kidney
• Renal corpuscle
The Nephron
– Glomerular capsule
(______________________)
– ______________________
• network of capillaries
• Arterioles
– ______________________
• blood to glomerulus
– ______________________
• drains
• Tubules
– _________ convoluted tubule
– _______________________
Fig. 27.5
• Descending limb
• Ascending limb
– _________ convoluted tubule
• Collecting ducts
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Ureters and Urinary Bladder
• Ureters
– tubes through which urine
flows from kidneys to
______________________
• Urinary bladder
– stores urine
• Urethra
– transports urine from
______________________
to outside of body
– difference in length
between males and females
– sphincters
• ___________________ Fig. 27.11
• ___________________
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Points to Remember
• Kidney filters blood to eliminate metabolic wastes
(e.g. urea formed from ammonia that is removed
from blood by liver) and reabsorb substances such
as sugars, amino acids, sodium and chloride
• Functional unit of kidney is nephron
• Ureters, urinary bladder and urethra transport
urine (product of nephron) outside of body
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Questions?
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