The four basic types of tissue are epithelial, muscle, connective, and what?
circulatory
regulatory
digestive
nervous
A tissue is a group of connected cells that have a similar function within an organism. More complex organisms such as jellyfish, coral, and sea anemones have a tissue level of organization. For example, jellyfish have tissues that have separate protective, digestive, and sensory functions. Though most animals have many different types of cells, they only have four basic types of tissue: connective, muscle, nervous, and epithelial.