How do cells work together?

A group of similar cells do the same job in an organism. This is called a tissue, no not the tissue you wipe your nose with, this tissue is like the inner parts of your skin, for example, tissue make up the skin of a peach, or your heart, and brain, and pretty much everything else. They combine to make an organ and your organs make up your body. Some examples of organs are, again the flesh of a peach or your heart. Organs can work together to make organ systems, it's like being paired up in a team. Here is a picture summarising my summary.