For example, the epithelial cells found on our skin are responsible for protecting us from UV radiation. The epithelial cells found in our stomach, on the lining of our stomach are basically responsible for secreting hydrochloric acid which gives our stomach its high acidity. And finally, the epithelial cells found in our intestines are responsible for absorbing the nutrients that we ingest into our body. Now, let's move on to our muscle tissue. The cells in our muscle tissue are basically responsible for generating the movement that our body is capable of making. For example, the reason I can bend my arm is a result of the muscle tissue that is found in my arm.