Answer: The four broad categories of tissues are: epithelial, connective, muscle, and nervous. Each of these categories is characterized by specific functions that contribute to the overall health and maintenance of the body.
Epithelial: skin, lining organs, inside mouth, abdominal cavity
Connective: the three outer membranes (the meninges) that envelop the brain and spinal cord are composed of connective tissue. They support and protect the body.
Muscle: heart, digestive organs, and blood vessels
Nervous: brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities.