There are four types of tissues that are created as cells join together and work as a group. Each type of tissue has a unique structure and does a specific job. Muscle tissue is made up of long, narrow muscle cells. Muscle tissue makes the body parts move by tightening and relaxing. Connective tissue is what holds up the body and connects its parts. The bone is made up of connective tissue. Nerve tissue comprises long nerve cells that carry messages through the body. Epithelial tissue is made of wide, flat epithelial cells. This tissue lines the surfaces inside the body and forms the outer layer of the skin. Groups of tissue join together to form the organs in the body, such as the heart, liver, lungs, brain, and kidneys. Then, these organs work together to form the body systems. Each system works together with the other systems of the body.

Which types of tissue have similarly shaped cells?