What differentiates tissues from cells?

Tissues are indeed defined as larger aggregates of similar cells that work together to perform specific functions. This distinction highlights that a tissue is made up of multiple cells that share common characteristics and roles, allowing them to cooperate effectively in bodily processes. For example, muscle tissue is composed of muscle cells that contract to enable movement, while epithelial tissue consists of cells that form protective barriers or are involved in absorption.

Understanding that tissues are organized collections of similar cells emphasizes the hierarchical structure of biology, where cells group together to form tissues, tissues aggregate to form organs, and organs develop into systems. This organization is crucial for the overall function and maintenance of living organisms, underscoring the compatibility and interdependence of various cellular functions within a tissue context.