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SS2: BIOLOGY - 2ND TERM

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  1. Mechanism of the Respiratory System | Week 1
    6 Topics
    |
    2 Quizzes
  2. Mechanism of Gaseous Exchange in Plants | Week 2
    1 Topic
    |
    1 Quiz
  3. Excretory Systems I | Week 3
    5 Topics
    |
    1 Quiz
  4. Excretory Systems II | Week 4
    4 Topics
    |
    3 Quizzes
  5. Nutrient Cycling in Nature I | Week 5
    3 Topics
  6. Nutrient Cycling in Nature II | Week 6
    2 Topics
    |
    1 Quiz
  7. Ecological Management | Week 7
    4 Topics
  8. Ecological Tolerance | Week 8
    2 Topics
    |
    1 Quiz
  9. Adaptation | Week 9
    3 Topics
    |
    1 Quiz



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Topic Content:

  • Respiratory Organs of Amphibians
  • Gills
  • Buccal Respiration
  • Cutaneous Respiration

Respiratory Organs of Amphibians:

Amphibians are cold-blooded blooded so they do not use up any energy for keeping their bodies at a constant temperature. This means their cells are not working as hard as warm-blooded animals like mammals, and they do not need as much oxygen.

The respiratory organs in amphibians are the gills, lungs, mouth (buccopharyngeal membrane) and the skin (cutaneous breathing). ​

Gills:

The gills are only specific for the tadpoles and a few other amphibians, which possess gills that help them breathe underwater.

Tadpole uses internal and external gills in order to respire within their aquatic environment. The gills filter oxygen from the water and dispose of respiratory waste products. The gills are lost as the tadpole transitions into a frog.

Buccal Respiration:

The inner lining of the mouth is the buccopharyngeal membrane which allows the exchange of gases with the atmosphere.

 

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