Unit Plan

Ck 12: Life Science: Respiration

Curated by ACT

[Free Registration/Login may be required to access all resource tools.] We breathe because we need oxygen. Breathing also releases carbon dioxide from our bodies into the air. The respiratory system is the body system that brings air containing oxygen into the body and releases carbon dioxide into the atmosphere. Learn more about respiration in this learning module produced by CK-12.

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Classroom Considerations
  • Knovation Readability Score: 2 (1 low difficulty, 5 high difficulty)
NGSS