This document summarizes the four main types of tissues in the body: epithelial, connective, muscle, and nervous tissue. It provides details on the subclasses of each type of tissue, including their structures, functions, and examples. Epithelial tissue covers and protects organs and lines body passages. Connective tissue binds and supports other tissues. Muscle tissue produces movement, with skeletal muscle under voluntary control and smooth and cardiac muscle involuntarily controlled. Nervous tissue is associated with the nervous system and transmits electrical signals.