What are the four main types of tissues found in animals?
Epithelial - Forms skin, covers and lines organs, derivded from the ectoder and endoderm.
Connective - Holds tissues and organ systems together, derivded from the mesoderm, tendons, bone, blood, ligaments.
Muscle - Allows for movement, also derived from mesoderm.
Nervous - Allows for coordination, derived from ectoderm.