Photosynthetic cells are specialized cells found in plants, algae, and some bacteria that convert sunlight into energy. These cells contain chloroplasts, which house the green pigment chlorophyll. This pigment captures sunlight and uses it to transform carbon dioxide and water into glucose and oxygen through a process called photosynthesis. In addition to providing energy for the organism, photosynthetic cells play a crucial role in the Earth's ecosystem. They produce oxygen, which is essential for the survival of most living organisms, and help regulate atmospheric carbon dioxide levels. This process supports life and contributes to the planet's overall health.