Here's a more detailed explanation:

* Tissue: A group of similar cells that work together to perform a specific function.

* Similar cells: These cells have a common origin and share a similar structure.

* Common function: The cells work together to carry out a specific task within the body, contributing to the overall function of the organism.

Think of it like this:

* Brick: A single cell, the building block.

* Brick wall: A tissue, where many bricks (cells) are organized to form a structure (tissue) with a specific function (like holding up a building).

There are four main types of tissues in the human body:

1. Epithelial tissue: Covers surfaces and forms linings, like the skin or the lining of your stomach.

2. Connective tissue: Supports and connects other tissues, like bone, blood, and cartilage.

3. Muscle tissue: Allows for movement, like skeletal muscle, smooth muscle, and cardiac muscle.

4. Nervous tissue: Carries information throughout the body, made up of neurons and glial cells.