Final answer:
A tissue is a group of specialized cells that work together to perform a specific function. These cells communicate with each other to coordinate their functions, which is necessary for the larger operations of organs and organ systems in an organism.
Step-by-step explanation:
A group of specialized cells that work together to perform the same function is known as tissue. In the human body, specialized cells like red blood cells, neurons, and epidermal cells are adapted to execute specific tasks efficiently. Red blood cells are optimized to carry oxygen through the blood, neurons are designed to conduct electrical impulses, and epidermal cells form protective layers.
Cells do not work in isolation; they must communicate with each other to function in concert. Just as individuals need to communicate in a group project, cells use various mechanisms to share information and coordinate their actions. This collaboration is essential for the complete workings of an organism, where various tissues come together to form organs, organs form organ systems, and organ systems work together to sustain the life of the organism.