Introduction

How do specialized cells work?



A9.1 Types of blood cells
Specialized cells are important to how multicellular organisms survive. They are needed to make up the systems that perform the basic life functions of the organism. For example, a human has many different kinds of specialized cells that make up the circulatory system. Without the circulatory system, oxygen and nutrients would not get to all the organs and tissues in our bodies. 

In this lesson, we will look at the importance of specialized cells and the systems they make up in plants.  

  Targets

By the end of this lesson, you will be able to

        • explain why when a single-celled organism or colony of single-celled organisms reaches a certain size, it requires a multicellular level of organization
        • explain why multicellular organisms need specialized cells, tissues, and systems in plants

          Watch This


        Biological Levels in Biology: The World Tour © YouTube The Amoeba Sisters


        This video gives you an overview of how cells organize themselves into organisms and even ecosystems. It gives you examples of the different levels and what they are used for.