Assertion: epithelium's surface | /r/HasProperty | free
Facets:
Source sentences:
text: Epithelium is arranged so there is one free surface (apical surface) and one attached surface (basal surface)
text: apical surface the upper or outer surface of each cell is free.
text: The upper surface of epithelium is free, or exposed to the outside of the body or to an internal body cavity.
text: Epithelium always has a free surface (apical surface) that is exposed to the body’s exterior or the empty cavity of an internal organ.
text: Other epithelia have motile cilia (hairlike projections) that push substances along their free surface.
text: Protective epithelium has a free surface exposed to the environment (skin, mucous membranes of the throat and vagina).
text: Additionally, some simple columnar epithelia may display cilia on their free surface also.
text: All epithelial tissues are free surfaces attached to the underlying layers of a basement membrane.
text: All epithelial tissues are free surfaces attached to the underlying layers of a basement membrane.