Homestasis and the Circulatory System

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Homestasis and the Circulatory System

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  1. Homeostasis and the Circulatory System

    Slide 1 - Homeostasis and the Circulatory System

  2. Review

    Slide 2 - Review

    • In order to be “alive”, something must meet the following criteria:
    • Made of cells
    • Contains genetic material (DNA)
    • Grows and Develops
    • Responds to stimuli
    • Able to reproduce
    • Has a metabolism
    • Able to maintain homeostasis
    • And as a group, EVOLVE
  3. HOMEOSTASIS AND THE CIRCULATORY SYSTEM

    Slide 3 - HOMEOSTASIS AND THE CIRCULATORY SYSTEM

    • HOMEOSTASIS is the body’s normal steady-state conditions. There are different factors both inside and outside of the body that could push the body “out” or “away from” homeostasis. Luckily, the body has different mechanisms (ways) to return to homeostasis.
    • One response that the body often uses when homeostasis is lost is called NEGATIVE FEEDBACK. Negative feedback is the body’s attempt to move the body in the opposite direction of the disruption.
  4. Functions (JOBS):

    Slide 4 - Functions (JOBS):

    • Transport nutrients, gases (oxygen, carbon dioxide), and wastes.
    • Fight infection.
    • Regulate body temperature .
  5. Sensing and Responding

    Slide 5 - Sensing and Responding

  6. Situation 1: Body Temperature

    Slide 6 - Situation 1: Body Temperature

    • Normal Human Body Temperature is 37 C or 98.6 F
  7. Imbalance: Drop in Body Temperature

    Slide 7 - Imbalance: Drop in Body Temperature

    • Possible causes:
    • Being out in the cold!
    • Poor circulation
    • Response by circulatory system:
    • Constriction of blood vessels
    • Response by other systems:
    • Shivering by muscular system
  8. END RESULT:

    Slide 8 - END RESULT:

    • Return to homeostasis
  9. Imbalance: Increase in Body Temperature

    Slide 9 - Imbalance: Increase in Body Temperature

    • Possible causes:
    • Being outside on a hot day!
    • Exercise
    • Response by circulatory system:
    • Dilation of blood vessels
    • Response by other systems:
    • Sweating by integumentary system
  10. END RESULT:

    Slide 10 - END RESULT:

    • Return to homeostasis
  11. Other Responses

    Slide 11 - Other Responses

    • The body also uses negative feedback in order to maintain homeostasis in:
    • Water balance
    • Blood sugar
    • Heart rate (and breathing rate)