Science helps us categorize all living things on earth. As the most basic branch of categories, Kingdoms provide structure to all life forms ranging from Microbes: Protozoans, to Plant Kingdom: Angiosperms, and Animals: Human Cardiovascular System. By learning to identify key aspects of each group, you will achieve proficiency in areas such as Plant Kingdom: Photosynthesis. Compare and contrast Animals: Invertebrates and Animals: Vertebrates. In our topic Microbes: Viruses, you will learn how each category impacts other life forms on the planet. From granular concepts to the big picture, Kingdoms will give you skills and insight to how all forms of life are classified into a comprehensive system.