Cells, Tissues, Organs, Systems Notes from 1/6/14 Cell: the basic unit of structure and function in a living thing. Examples: skin cell, neuron (nerve cell), red blood cell, etc. etc. Different kinds of cells have different functions. When cells with a similar function join together, they make a tissue. Tissue: cells with similar function joined together Examples: muscle tissue; nervous tissue (sends electrical signals); connective tissue (support); epithelial tissue (lining surfaces, inside and out) Organ: different kinds of tissues working together to do a specific job, more complex than tissue Examples: stomach, lungs, brain, liver, etc. etc. Organ system: group of organs working together to accomplish a major function For example: digestive system (stomach, small intestine, large intestine, liver, pancreas, and more) working together to get nutrients for the body Other examples: nervous system, skeletal system, muscular system, etc.