It depends on the species and size. The ones commonly found where I live (The Norway Rat) at full grown have one approximately the size of a thumb nail.
kidney
a kidney cell is also called a nephritic cell which is further classified as a somatic cell.
Any size you want it to be.
Millions even billions cells in human kidney.
yes
They are cells taken from an embryo in which they can be added to someone to change into a specialised cell. For example if a kidney needed to be replaced then an emryonic stem cell would have the nucleus of a working kidney cell added to it and then would be placed into the kidney of the patient, this will then trigger the reproduction of working kindey cells.
stomach
anemia. The kidneys are responsible for producing erythropoietin (EPO), a hormone that stimulates red blood cell production. If kidney disease causes shrinking of the kidney, red blood cell production is reduced
basketball
size of hydrilla cell?
cell size is important for the cell process because if the cell size is different it will change the way everything else is.
In 2009 I had a Kidney stone removed in a two hour operation that was the same size as a Golf Ball. What would that be in metric! I have just found out that in the same Kidney I now have a 13mm stone plus a cyst.