Help with a science project

I am working on a science project, and there is one thing I can't seem to be sure of an dI was wondering if you guys know.

Do red blood cells (erythrocytes) have cytoplasm? I know they contain mainly haemoglobin, and they have a membrane and no other organelles.. or do they have cytoplasm aside from their lack of a nucleus and other traditional organelles?

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Okay, thanks.

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