What term describes groups of cells that perform the same function?

• A. Tissues
• B. Organs
• C. Systems
• D. Cells

Answer: (A)

Grouping of cells that perform the same function is called a tissue. A tissue is made of similar cells working together to carry out a specific role, such as muscle tissue that contracts or epithelial tissue that lines and protects surfaces. This level of organization sits between individual cells and organs—organs are composed of multiple tissues that coordinate to perform broader tasks, while organ systems are groups of organs working together. Cells alone describe a single unit, not a collective function, and systems describe larger assemblies. So tissue best fits the idea of groups of cells sharing a common function.