Question: what are the general functions of each of the four main types of tissue in animals?
Answer: 3.1 Epithelial Tissue. They cover the body, organs, blood vessels and all body cavities. ... 
3.2 Muscular Tissue. Smooth, Skeletal, and Cardiac Muscles. ... 
3.3 Connective Tissue. Connective tissues are made up of fibrous cells. ... 
3.4 Nervous Tissue. Neuron Structure.