What is a tissue?

A tissue is defined as an integrated group of cells that work together to perform a specific function. In the human body, tissues are classified into four main types: epithelial, connective, muscle, and nervous tissues. Each type has distinct characteristics and roles, contributing to the overall function and structure of organs and systems within the body. For instance, muscle tissue is responsible for movement, while connective tissue supports and binds other tissues together. This understanding emphasizes the cooperative nature of cells in forming tissues, highlighting their importance in biological organization. In contrast, an individual cell refers to the smallest unit of life and does not encompass the idea of collective function, while an organ is composed of multiple tissues working in synergy. Similarly, bones, while important anatomical structures, do not represent the broader definition of tissue as they are classified under connective tissue specifically.