red blood cell
US /ˌred ˈblʌd sel/
UK /ˌred ˈblʌd sel/

1.
czerwona krwinka, erytrocyt
a type of blood cell that is produced in the bone marrow and contains hemoglobin, which transports oxygen to the body's tissues and carries carbon dioxide away from them
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The doctor ordered a test to check her red blood cell count.
Lekarz zlecił badanie, aby sprawdzić liczbę jej czerwonych krwinek.
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Anemia is often caused by a low red blood cell count.
Anemia jest często spowodowana niską liczbą czerwonych krwinek.