For photosynthesis to occur, a plant needs sunlight, water and carbon dioxide. To see photosynthesis in action, we will observe how a green plant (elodea) uses sunlight to take in CO2 and release O2 (control). In addition, we will deny sunlight to another specimen, to observe how photosynthesis does not occur without sunlight. Follow the procedures below to complete this experiment.
Blood circles through the heart, which pumps it to the lungs where it picks up oxygen - this is the pulmonary circulation. This resources tracks the route of blood through the heart and lungs and provides illustrated diagrams and assessment tools.