Cells specialize to form tissues that group together to perform shared functions. Tissues then combine to form organs which work together in organ systems to carry out body functions. For example, the stomach organ contains muscle tissue made up of individual muscle cells, and is part of the digestive system organ system.
2. LEVELS OF ORGANISATION Organelle: a structurewithin a cell. Tissue: a group of cellswith similar structures,workingtogethertoperform a sharedfunction. Organ: a structuremade up of a group of tissues, workingtogethertoperformspecificfunctions. Organsystem: a group of organswithrelatedfunctions, workingtogethertoperformbodyfunctions.
8. Organs, cells and tissues The stomach is an organ, part of the digestive system The stomach wall contains muscle tissue The muscle tissue consists of muscle cells
