In aquatic plants, the palisade cells are absent so that there is more intercellular Spaces (air Spaces) for buoyancy.

Analysing both the total and apoplastic activity in the leaves, the peroxidase was mainly located at intercellular Spaces.

A lot of lymphatic capillaries which had no basement membrane were found in intercellular Spaces of adipose cells at superficial portions of the milky spot.