1. The Excretory System Unit 1 Lesson 4
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2. RED SLIDE: These are critical notes that should be recorded or highlighted in your science book.
First and last Name
Science, Grade, Class

3. RED SLIDE: These are notes that are very important and should be recorded in your science journal.
BLACK SLIDE: Pay attention, follow directions, complete projects as described and answer required questions neatly.
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4. Keep an eye out for “The-Owl” and raise your hand as soon as you see her.
She’ll be hiding somewhere in the slideshow
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5. “Hoot, Hoot” “Good Luck!”
Keep an eye out for “The-Owl” and raise your hand as soon as you see her.
She’ll be hiding somewhere in the slideshow
“Hoot, Hoot”
“Good Luck!”
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6. New Area of Focus: The Excretory System
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7. Are we discussing #1 or #2?

8. Are we discussing #1 or #2? #1

9. The excretory system cellular wastes from the body through the lungs, skin, kidneys, and digestive system.
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10. A B C The excretory system removes excess… Nutrients Marrow Cells
Oxygen
Oxygen
Nutrients
Plasma
Air
Water
Salts
CO2
Urea
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11. A B C The excretory system removes excess… Nutrients Marrow Cells
Oxygen
Oxygen
Nutrients
Plasma
Air
Water
Salts
CO2
Urea
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12. C The process that removes these wastes is called excretion. Water
Salts
CO2
Urea
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13. C Which two do the lungs get rid of? Water Salts CO2 Urea
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14. C Which two do the lungs get rid of? Water Salts CO2 Urea
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15. Which two do the lungs get rid of?
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Water
Salts
CO2
Urea

16. C Which does the skin get rid of? Water Salts CO2 Urea
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17. Which does the skin get rid of?
Water
Salts
CO2
Urea

18. Which does the skin get rid of?
Pg. 53 C
Water
Salts
CO2
Urea

19. The remaining organs of the excretion are the organs of the Urinary Sytem:

20. The remaining organs of the excretion are the organs of the Urinary Sytem: kidneys,

21. The remaining organs of the excretion are the organs of the Urinary Sytem: kidneys, ureters

22. The remaining organs of the excretion are the organs of the Urinary Sytem: kidneys, ureters, bladder

23. The remaining organs of the excretion are the organs of the Urinary Sytem: kidneys, ureters, bladder, and urethra.

25. Which organ of the excretory system does this picture represent?

26. Which organ of the excretory system does this picture represent?
KIDNEYS!!

27. The Urinary System

28. The Kidneys:
They filter waste products from the blood to keep it clean and balanced.
Nephrons-more than 1 million in each kidney that filter the blood
Water and the wastes filtered out of the blood form a liquid called urine
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29. The Kidneys: They filter waste products from the blood to keep it clean and balanced.
Learn more about the kidneys and kidney diseases at…

30. Urinary System and Cardiovascular System
The Kidneys: They filter waste products from the blood to keep it clean and balanced.
Urinary System and Cardiovascular System
Learn more about the kidneys and kidney diseases at…

31. Bean shaped organ about size of fist located near the middle of the back.
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32. Which letter below is this cat’s Right Kidney?

33. Which letter below is this cat’s Right Kidney?

34. Copyright © 2010 Ryan P. Murphy

35. The kidneys process about 200 quarts of blood and produce 2 quarts of waste product (urine).
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36. The kidneys process about 200 quarts of blood and produce 2 quarts of waste product (urine).
The urine travels through the ureters to the bladder
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37. Waste comes from old tissues / cells and from food as the body uses energy and repairs itself.
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38. Waste comes from old tissues / cells and from food as the body uses energy and repairs itself.
This waste, if not removed will build-up and cause damage.
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39. Waste comes from old tissues / cells and from food as the body uses energy and repairs itself.
This waste, if not removed will build-up and cause damage.
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40. Each kidney has how many nephrons?
A.) ½ a nephron
B.) One full nephron
C.) 6 nephrons
D.) A million nephrons
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41. Each kidney has how many nephrons?
A.) ½ a nephron
B.) One full nephron
C.) 6 nephrons
D.) A million nephrons
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42. The Kidney
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43. The Kidney

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47. The tiny blood vessels in the nephrons act like strainers.
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48. The tiny blood vessels in the nephrons act like strainers.
Waste in the blood spills out through the holes while the nutrients and blood do not.

49. The tiny blood vessels in the nephrons act like strainers.
Waste in the blood spills out through the holes while the nutrients do not.
Urea
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50. The tiny blood vessels in the nephrons act like strainers.
Waste in the blood spills out through the holes while the nutrients and blood do not.
Urea
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51. The tiny blood vessels in the nephrons act like strainers.
Waste in the blood spills out through the holes while the nutrients and blood do not.
Salts
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52. The tiny blood vessels in the nephrons act like strainers.
Waste in the blood spills out through the holes while the nutrients and blood do not.
Water
Urine is about 96% Water.
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53. The tiny blood vessels in the nephrons act like strainers.
Waste in the blood spills out through the holes while the nutrients and blood do not.
Water
Blood Cell
Protein
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54. The tiny blood vessels in the nephrons act like strainers.
Waste in the blood spills out through the holes while the nutrients and blood do not.
Water
Too Large to fit through
Blood Cell
Protein
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55. The kidneys measure out chemicals such as sodium, phosphorus, and potassium and release them back to the blood to return to the body.
The kidneys regulate / balance the bodies level of these substances.
Homeostasis
Reabsorption

56. The kidneys measure out chemicals such as sodium, phosphorus, and potassium and release them back to the blood to return to the body.
The kidneys regulate / balance the bodies level of these substances.
Homeostasis
Reabsorption
Copyright © 2010 Ryan P. Murphy

57. The kidneys measure out chemicals such as sodium, phosphorus, and potassium and release them back to the blood to return to the body.
The kidneys regulate / balance the bodies level of these substances.
Homeostasis
Reabsorption

58. The amount of water and salts that you consume changes your urine.

59. B A The amount of water and salts that you consume changes your urine.
Which person drank plenty of water this morning? B A
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60. B A The amount of water and salts that you consume changes your urine.
Which person drank plenty of water this morning? B A
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61. A B The amount of water and salts that you consume changes your urine.
Which person ate lots of salty junk food this morning? A B
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62. If you eat lots of salty foods you will produce less urine
If you eat lots of salty foods you will produce less urine. That urine will have less water in it. A B
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63. If you eat lots of salty foods you will produce less urine
If you eat lots of salty foods you will produce less urine. That urine will have less water in it.
Your kidneys control the amount of water in your body. A B
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64. As a general rule, you want your urine to be clear and copious.
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65. As a general rule, you want your urine to be clear and copious.
Copious: Abundant in supply or quantity.
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66. As a general rule, you want your urine to be clear and copious.
Copious: Abundant in supply or quantity.
Not bright yellow once a day.
Copyright © 2010 Ryan P. Murphy

67. As a general rule, you want your urine to be clear and copious.
Copious: Abundant in supply or quantity.
Not bright yellow once a day.
Copyright © 2010 Ryan P. Murphy

68. As a general rule, you want your urine to be clear and copious.
Copious: Abundant in supply or quantity.
Not bright yellow once a day.
Copyright © 2010 Ryan P. Murphy

69. Should the person below drink more hydrating fluids?

70. Should the person below drink more hydrating fluids? Okay

71. Should the person below drink more hydrating fluids?

72. Should the person below drink more hydrating fluids? Yes

73. Should the person below drink more hydrating fluids?

74. Should the person below drink more hydrating fluids? Not needed.

75. Should the person below drink more hydrating fluids? Not needed.

76. Should the person below drink more hydrating fluids? Not needed.

78. Which is a better choice to stay hydrated?

79. Which is a better choice to stay hydrated?

80. That’s 34 grams of sugar.

81. Can you drink your own urine?
If your stuck on a raft etc. in a survival situation in the middle of the ocean.

82. Drinking your urine may keep you alive an extra day or two.
Urine is mostly water so it can replenish lost water. 95%
The other 5% is going back to your kidneys and after a day or two this highly concentrated waste can cause kidney failure.
Urine contains salts and waste products. It’s not recommended to consume more than once or twice if in an extreme survival situation.
So your in trouble from total dehydration, or complete kidney failure.

83. Kidney Stone: A hard mass formed in the kidneys, typically consisting of insoluble calcium compounds.

85. Kidney Stones: Cause severe stomach and back aches that last for a long period.

86. The ureters are tubes that connect the kidneys to the bladder.
Urine travels from the kidneys through narrow tubes called ureters to the bladder.
The ureters are tubes that connect the kidneys to the bladder.
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87. Urinary Bladder: Saclike organ that stores urine until excretion.
Voluntary muscles hold the urine until it is ready to be released
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88. Kidneys
Ureters
Bladder
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89. Kidneys
Ureters
Bladder
Urethra
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90. Urethra: Urine exits the bladder through a tube called the urethra.
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95. The sphincter muscles keep urine in the bladder until relaxed.

96. When you contract your bladder muscles you will urinate.

97. When you contract your bladder muscles you will urinate.
Squeeze

110. Empty

111. Full

112. Muscular System Urinary System
Full
Muscular System
Urinary System