Biology

This post is tied to the post I made about plant tissues. Animal tissues are classified into a LOT of categories and sub-categories. I am not going to do that. This will cover the general types and …

The most basic and functional unit of life is called a cell. These cells make up every organism on earth. First discovered by Robert Hooke  external link when examined some cork  …

Tissues are groups of cells with similar structure, composition and functions. They are an intermediary between basic cells and complete organs. The hierarchy of components of living (multicellular) …