Body Tissues. Tissue is a group of cells that have similar structure and that function together as a unit. A nonliving material, called the intercellular matrix, fills the spaces between the cells. This may be abundant in some tissues and minimal in others.issue is a group of cells that have similar structure and that function together as a unit. A nonliving material, called the intercellular matrix, fills the spaces between the cells.
Mechanical Engineering student & Senior Supervisor on WikiAnswers. Summer Rae is 31 years old. She was born on November 28, 1983 in Manhasset, New York.
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