| A | B |
|---|
| cell specialization | separate roles for each type of cell in multicellular organisms |
| tissue | group of similar cells that perform a particular function |
| epithelial tissue | tissue like the skin, that covers and lines the body |
| muscle tissue | tissue that controls the internal movement of materials in the body as well as the external movement of the entire body or body parts – it makes up skeletal, smooth, and cardiac muscle |
| nervous tissue | tissue that receives messages from the body’s external and internal environment, analyzes the data, and directs the response – it is found in the nervous system including the brain and spinal cord |
| connective tissue | tissue that holds organs in place and binds different parts of the body together – it includes the bone, blood, cartilage, and lymph |
| organ | group of tissues that work together to perform closely related functions |
| organ system | group of organs that work together to perform a specific function |
