Penny Clark commented on red blood cells in guanacos. In fact, they are not
spherical but elliptic. For teaching purposes, I have collected stained
slides of a number of camelids for lack of a slide of human hereditary
elliptocytosis (which I have never come across). The elliptic shape is a
unique feature for all camelid red blood cells as far as I can tell. The
design makes the cells less sensistive to haemolysis and they can "swallow"
a lot of fluid if available.
For the interested, there is even an atlas of camelid red blood cell
morphology published years ago in English and in Arabic language - a rare
book which makes funny reading.
Priv.-Doz. Dr. med. Michael Steiner
Medizinisches Labor Rostock
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