Tissue: Learn about the four types of

Learn about the four types of animal tissues (connective, muscle, nervous and epithelial) and their functions. Also, explore the three types of plant tissues (epidermis, vascular and ground) and their classification based on parts and cells. Tissue , in physiology, a level of organization in multicellular organisms; it consists of a group of structurally and functionally similar cells and their intercellular material. By definition, tissues are absent from unicellular organisms. Learn more about tissues in this article. Body Tissue One step up from cells are tissues. These collections of cells handle specific jobs throughout your body. There are four main types of tissues: epithelial, connective, muscle and nervous. But people commonly use the term “ tissue ” informally to talk about parts and structures throughout the body, too.