posted by marie .
Name an example of a cell, tissue, organ, and organ system in the human body that illustrates the concept of increasing complexity of biological organization. For each step forward in biological organization, briefly describe a specific function that is gained at each step (three steps)
I would examine glial cells as an example.
Ok the guy above is a retard and hasn't answered the question.
Cell: Epithelial Cell (to be specific lets say a Glandular Epithelial Cell)
Tissue: Epithelial Tissue
System: Immune system