An integrated group of cells with a common function, structure, or both.

• A. Vein
• B. Tissue
• C. Cardiology
• D. Diastole

Answer: (B)

Tissue is an integrated group of cells that share a function or structure. This captures the idea of cells working together in a coordinated way to perform a common job, which is exactly what the statement describes. For example, cardiac muscle tissue in the heart contracts to pump blood, illustrating how a tissue’s cells collaborate to carry out a specific function. A vein, while made of several tissue layers, is a structure rather than the basic unit defined by this description. Cardiology is a medical specialty, not a cellular organization. Diastole is a phase of the heartbeat. So the term that fits the description is tissue.