A group of cells having common origin, similar structure and performing a definite function is called a tissue. Tissues are found in plants and animals. Plant tissues can be grouped into two basic types: meristematic and permanent tissues. Parenchyma and Sclerenchyma are permanent tissues. Animal tissues can be grouped into four basic types: epithelial, muscular, connective and nervous tissues. Different tissues have distinctive architecture best suited for what they do.
This video describes how to identify Plant tissues (parenchyma and sclerenchyma) and Animal tissues (striated (striped) muscle fibres and nerve cells) from the prepared slides.