Human Circulatory System Key Concepts and Structures Exam Questions and answers

Human Circulatory System Key Concepts and Structures Exam Questions and answers What do transport systems move in living organisms? - Oxygen, nutrients, hormones, and wastes. What additional functions do transport systems serve? - Defense, tissue repair, and temperature regulation. How do unicellular organisms transport materials? - Through selectively permeable cell membranes and internal structures via diffusion and osmosis. What is an example of a simple multicellular organism? - Hydra and Paramecium. How do sponges circulate water? - Using flagellated cells and through pores called ostia. What are the key components of a true circulatory system? - Circulatory vessels, circulatory fluid (blood or hemolymph), and a muscular pump (heart).