TISSUES A tissue is a group of cells (and their associated extracellular material) which work together 
(A tissue; is; a group of cells (and their associated extracellular material) which work together) (a group of cells (and their associated extracellular material; work together; )
A tissue a group of cells (and their associated extracellular material
is work together
a group of cells (and their associated extracellular material) which work together