This is the 5683rd most frequent German word.
blutkörperchen
"Blutkörperchen" means "blood cell" in English.
The term "Blutkörperchen" is used here to refer to red blood cells within the context of their biological function.
Die roten Blutkörperchen transportieren Sauerstoff durch den Körper.
The red blood cells transport oxygen through the body.
In this sentence, "Blutkörperchen" is part of the compound "Weiße Blutkörperchen," specifying their type and emphasizing their role.
Weiße Blutkörperchen spielen eine Schlüsselrolle im Immunsystem.
White blood cells play a key role in the immune system.
Here, "Blutkörperchen" is used generically to refer collectively to the cells in the blood.