human buccal and cervical-vaginal mucosal epithealial cells , fallopian tube mucosa , and sperm bound pili in greater numbers per micrometer2 of surface area ( 1 -- 10 ) than fetal tonsil fibroblasts , hela m cells , erythrocytes , or polymorphonuclear leukocytes .
C0007634
cells
C0016030
fibroblasts