Download Excretory System Booklet (ANSWER KEY

Name: ________________
Class: _________
Date: _______________
Excretory System Booklet (ANSWER KEY – answers are in italics)
1. a) Using the diagram below, complete the following:
□ Color the AORTA/RENAL ARTERY red
□ Color the INFERIOR VENA CAVA/RENAL VEIN blue
□ Color each KIDNEY brown
□ Color the URINARY BLADDER yellow
□ Color the URETHRA green
□ Label the aorta, inferior vena cava, renal artery, renal vein, kidneys, urinary
bladder and urethra
b) Describe the function of and underline (using the color you used for the diagram) the
following terms:
Aorta/Renal Artery: carries oxygenated blood from the heart to the kidneys
Inferior Vena Cava/Renal Vein: carries deoxygenated blood from the kidneys to the heart
Kidney: helps filter the blood to remove wastes from the body, balances blood pH and helps to
maintain water balance
Urinary Bladder: muscular organ that stores urine
Urethra: a tube that carries urine from the bladder to the exterior of the body
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Name: ________________
Class: _________
Date: _______________
2. a) Using the diagram below, complete the following:
□ Color the CORTEX purple
□ Color the MEDULLA orange
□ Color the RENAL PELVIS pink
□ Color the URETER green
□ Label the cortex, medulla, renal pelvis and ureter.
b) Define and underline (using the color you used for the diagram) the following terms:
Cortex: outer portion of the kidney
Medulla: inner portion of the kidney
Renal Pelvis: cavity at base of each kidney; receives urine from collecting duct system and
empties it into ureter
Ureter: tube that connects the kidney to the bladder; transports urine
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Name: ________________
Class: _________
Date: _______________
3. a) Using the diagram below, complete the following:
□ Color the GLOMERULUS red
□ Color the BOWMAN’S CAPSULE orange
□ Color the PROXIMAL TUBULE green
□ Color the LOOP OF HENLE purple
□ Color the DISTAL TUBULE brown
□ Color the COLLECTING DUCT yellow
□ Label the glomerulus, Bowman’s capsule, proximal tubule, loop of henle,
distal tubule, and collecting duct
b) Describe the function of and underline (using the color you used for the diagram) the
following terms:
Glomerulus: a high-pressure capillary bed that is the site of blood filtration
Bowman’s Capsule: a cuplike structure that surrounds the glomerulus; receives filtered fluids
from the glomerulus
Peritubular Capillaries: a network of small blood vessels that surround the nephron
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Name: ________________
Class: _________
Date: _______________
Proximal Tubule: section of the nephron joining Bowman’s capsule with the loop of Henle;
found within the cortex of the kidney
Loop of Henle: carries the filtrate from the proximal tubule to the distal tubule
Distal Tubule: conducts urine from the loop of Henle to the collecting duct
Collecting Duct: receives urine from a number of nephrons and carries urine to the renal pelvis
4. Using the diagram below to help answer the following questions.
a) Consider the formula :
amount excreted = amount filtered + amount secreted – amount reabsorbed
Using blue, draw arrows on the diagram below to represent renal (kidney) handling of a
hypothetical filtered substance “X” which is filtered and secreted BUT NOT reabsorbed
*HINT: Not all of the substance is filtered, but all of it is secreted.
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Name: ________________
Class: _________
Date: _______________
b) Using green, draw arrows on the diagram below to represent renal (kidney) handling of a
hypothetical filtered substance “Y” which is filtered and a fraction is then reabsorbed.
*HINT: Only a portion of the substance is filtered, and then only a fraction is reabsorbed.
c) Using purple, draw arrows on the diagram below to represent renal (kidney) handling of a
hypothetical filtered substance “Z” which is filtered and completely reabsorbed.
*HINT: Only a portion of the substance is filtered, but all of the substance is reabsorbed.
d) What is an example of each substances “X”, “Y”, and “Z” ?
“X” urea, “Y” salt, “Z” sugar (glucose)
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