The human cells are on average much larger. In general eukaryotic cells are much larger than prokaryotic cells, and most of the non-human cells in a human are

The human cells are on average much larger. In general eukaryotic cells are much larger than prokaryotic cells, and most of the non-human cells in a human are prokaryotic. All bacteria for example are prokaryotic. I don't think the fraction of water is higher in eukaryotic cells than in prokaryotic cells. I think water constitutes about 70% of both types of cells.