Cells that form most tissues and organs in an organism are called somatic cells. These cells make up the majority of cells in the body and are responsible for performing the functions necessary for the organism to survive and thrive. Some examples of tissues and organs that are made up of somatic cells include the skin, muscle, bone, blood, and organs such as the heart, lungs, and liver. Somatic cells are essential for the proper functioning of the body and play a crucial role in maintaining homeostasis.