the mesenchymal fraction was consistently devoid of epithelium when collected from neonatal mice ( 5 days old or younger ) , but mesenchyme from uteri of mice greater than or equal to 10 days old was usually contaminated with epithelial cells due to retention of glandular epithelial crypts in the mesenchyme following removal of the luminal epithelium .
C0014597
epithelial cells
C0014609
epithelium