"Interstitial tissue" refers to the connective tissue that fills the spaces between the organs, tissues, and cells in the body. It provides structural support and acts like a cushion for these structures. Full definition
Water is distributed all over the body: inside the cells, in the blood and in the interstitial tissue. (chronobiology.com)
The ruptured follicles and interstitial tissues were filled with round or granular eosinophilic bodies (Fig. 3C). (journals.plos.org)
Since it is still beyond the reach of even the most sophisticated in vitro methodology to simulate the complex interplay of physical, cellular, biochemical, and other factors that influence cell behavior in microvessels and interstitial tissues, we make use of intravital microscopy. (research.hsr.it)