In multicellular organisms, tissues are organized entities of cells that work together to carry out a particular function. The main role of a tissue in an organism depends on what types of cells it contains. In these slideshows you will learn more about cells, tissues and different compartments in a body.
http://www.elcamino.edu/faculty/jpadilla/Physiology Materials/Ch3 compartments & cellsf07.ppt
http://web.eng.fiu.edu/~brownmweb/BME3403/PowerPoint lectures Class/03_lect modified.ppt