diatomaceous earth biological word written on english language on white background

airborne autotrophic background biological black blood body border canal centralize circle circles color colour covered covering dark dental diagrams diatomaceous diseases displayed displaying earth english equation experimental five food form formula geometric glands heterotrophic highlighted highlights ion language life medical multicolored numerical orange organs origin page paper parasitic pattern pen peristalsis point presentation presented presenting processes protein reaction red respiratory saprotrophic significance six symbiotic symposium system terminology testing text texting three tools transpiration underlined water white word written yellow