Cytoplasm does not contain extracellular fluid (ECF) in the traditional sense, as ECF refers to the fluid outside cells, including interstitial fluid and blood plasma. Instead, cytoplasm is the gel-like substance within the cell membrane, consisting of cytosol, organelles, and various inclusions. While cytoplasm can interact with ECF through the cell membrane, it is distinct from the ECF that exists outside the cell.
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