Ms. Goodson's Life Science Blog - Blog - Essential …...Excretory System The role of the Excretory...
Transcript of Ms. Goodson's Life Science Blog - Blog - Essential …...Excretory System The role of the Excretory...
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Essential Question:How do major organ systems
work together in living organisms?
Standards:
S7L2d. Explain that tissues, organs, and organ systems serve the needs cells have for oxygen, food, and waste removal.
S7L2e. Explain the purpose of the major organ systems in the human body (i.e., digestion, respiration, reproduction, circulation, excretion, movement, control and coordination, and for protection from disease).
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Watch the video clip below and identify which system of the body
has a similar function.
http://www.youtube.com/watch?v=8erOa6W67IM
[watch 1 min 30 seconds]
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Digestive System
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Role of the Digestive System
Series of organs that convert food into essential
nutrients, and moves unwanted waste out
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How does it do it?
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Chewing• Mechanical
Digestion –Breaking down food into smaller pieces
• Teeth are used to break food into smaller pieces
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EsophagusPipe connecting the mouth to the
stomach (involuntary muscles)
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StomachFood is chemically broken down by
acid to form paste called Chyme
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Chemical Digestion
Food is converted (changed) into
substances that can be absorbed by the body
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Small IntestineWhere the nutrients (glucose, protein,
etc.) are absorbed into the bloodstream
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Large Intestine• Pulls out water from left overs
• Last portion called rectum
• Anus is the opening at the end
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Finish the Story
Because Mrs. Fizzle’s class doesn’t want to exit Arnold “the back way”, they decide to go back the
way they came. Write a brief explanation of the route they will take and what they will see and experience as they go back the way they came.
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The Urinary System
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Role: Our urinary system produces, stores and eliminates urine, the fluid
waste excreted by the kidneys
What does excreted mean?
The Urinary System
Synonyms: Eject, Remove,
Expel, Pass
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Parts of the Urinary System
Kidney
Ureters
Bladder
Urethra
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KidneysAct as filters for your body to clean waste from
the blood and remove urea [a waste product formed by the breakdown of proteins]
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UretersA set of tubes
connecting the kidneys to the
bladder
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BladderA hollow muscular organ shaped like a balloon, that stores urine until you are ready to empty it.
The bladder can hold up to 16 ounces (almost half a liter) of urine comfortably for 2 to 5 hours.
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UrethraA tube that connects
the bladder to the outside of the body
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Excretory SystemThe role of the Excretory
System is to remove wastes from the body.
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Organs that Excrete Waste
Organ What it Excretes
Lungs Carbon Dioxide
Kidney/Bladder Urine
Large Intestine Feces (food waste)
Skin Excess water/Salt
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Skin• Our Body sweats to maintain temperature• You may have noticed you sweat more in
places like your feet, your hands or your forehead
• This is because you have more sweat glands in those areas
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Write it DownOn a scratch sheet of paper write a brief
statement explaining how this trash truck is similar to the organs in your
excretory system and how it is different.