What term describes a structure made of different tissues working together to perform a function?

• A. Tissue
• B. Organ
• C. System
• D. Gland

Answer: (B)

Structures in the body are built from tissues, and when different tissues come together to perform a specific task, that structure is an organ. Tissues are groups of similar cells that carry out related functions, but an organ brings together multiple tissue types to work as a unit for a particular job. For example, the heart contains muscle tissue to contract, connective tissue to support, and nervous tissue to coordinate activity, all collaborating to pump blood. A gland is a specialized type of organ focused on secretion, and a system refers to several organs working together for broader physiological tasks. So, the term for a structure made of different tissues acting in concert is organ.