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Introduction to Anatomy & Physiology: Phases of Respiration Video

ACLS Certification Association videos have been peer-reviewed for medical accuracy by the ACA medical review board.

Video at a Glance

  • Systemic respiration is the process of oxygen transfer from the air to the cells, while cellular respiration focuses on how cells use oxygen to create energy in the form of ATP.
  • The systemic respiration cycle has four phases, including pulmonary ventilation, external gas exchange crossing over the alveolar-capillary membrane, gas transport in the bloodstream, and internal gas exchange from the bloodstream to the cells.
  • Cells need energy to function, synthesize and secrete molecules, and act as ion pumps.

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