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en.wikipedia.org/wiki/Red_blood_cell

Red blood cells (RBCs), also called erythrocytes, are the most common type of blood cell and .... The size of red blood cells varies widely among vertebrate species; red blood cell width is on average about 25% larger than capillary diameter, ...

www.labce.com/spg579126_red_blood_cell_rbc_size_variation.aspx

Normal RBCs have a diameter of 6 - 8 μm. On a peripheral blood smear, normal RBCs are disc-shaped with a pale-staining central area called the central pallor.

www.cellsalive.com/howbig.htm

The head of a pin is about 2mm in diameter. Use this animation to compare the relative sizes of cells and organisms sitting on a pinhead. Nearly invisible without  ...

www.healthhype.com/red-blood-cells-functions-size-structure-life-cycle-pictures.html

Red blood cells, or erythrocytes, are the most abundant cells in the bloodstream and contains hemoglobin, the compound that carries oxygen through the body.

www.mhhe.com/biosci/ap/histology_mh/wbc4.html

Red blood cells(RBC's) can vary in size due to pathologies but for the most part are consistently 7.5-8 micrometers in diameter. Since RBC's are abundant in any  ...

www.ncbi.nlm.nih.gov/pubmed/6860793

Blood. 1983 Jul;62(1):214-7. Red blood cell size is important for adherence of blood platelets to artery subendothelium. Aarts PA, Bolhuis PA, Sakariassen KS,  ...

www.urmc.rochester.edu/encyclopedia/content.aspx?ContentTypeID=160&ContentID=34

Red blood cells are round with a flattish, indented center, like doughnuts without a hole. Your healthcare provider can check on the size, shape, and health of ...

laboratoryinfo.com/variations-in-red-blood-cell-morphology

Apr 11, 2015 ... Red blood cells are the major cellular component of blood. Mature red blood cells are biconcave discs that lack nucleus and most cell ...

book.bionumbers.org/how-big-is-a-human-cell

Red blood cells need to squeeze through narrow capillaries and their small size and biconcave disk shape achieve that while also maximizing the surface area ...

www.britannica.com/science/red-blood-cell

The mature human red blood cell is small, round, and biconcave; it appears ... to carry carbon dioxide, a waste product of metabolism, to the lungs, where it is ...