ervecellen
Ervecellen is a term that appears to be a misspelling or a very obscure reference. It does not correspond to any widely recognized scientific, biological, or medical term. It is possible it is a typographical error for "erythrocyte" which is the scientific term for a red blood cell. Red blood cells are the most common type of blood cell and the vertebrate's main means of delivering oxygen to the body tissues—via blood flow to the lungs where, of course, they pick up oxygen. In the lungs the erythrocyte picks up oxygen in the blood and uploads, about one quarter of the total amount of the oxygen, to the tissues.
If "ervecellen" is intended to refer to a specific, niche concept within a particular field or language,