What are groups of cells with a common structure and function called?

Groups of cells that share a common structure and function are referred to as tissues. This concept is fundamental in biology and anatomy, as tissues represent a level of organization that exists between individual cells and more complex structures like organs.

In the human body, tissues are classified into four primary types: epithelial, connective, muscle, and nervous tissues. Each of these tissue types is specialized to carry out specific functions that work together to support the overall health and functioning of the organism. For instance, muscle tissue is designed for contraction and movement, while connective tissue provides support and structure.

Understanding tissues is crucial in the field of esthetics as it relates to the skin and underlying structures, which are composed of various types of tissues that perform specific roles in maintaining skin health and appearance. The interactions and functions of these tissues are essential knowledge for estheticians to effectively perform treatments and provide care.