Answer:
The entry and exit method refers to the pathway that allows substances to enter and exit a living organism or cell. Here are the pathways for sunlight, oxygen, carbon dioxide, and water:
- Sunlight: Sunlight enters plants through the leaves by a process called photosynthesis. Chlorophyll pigments in the leaves absorb the sunlight, which is then used to convert carbon dioxide and water into glucose (sugar) and oxygen.
- Oxygen: Oxygen enters the body through the respiratory system. When we inhale, oxygen is taken in through the nose or mouth and travels down the trachea and bronchial tubes to reach the lungs, where it is exchanged for carbon dioxide in the blood.
- Carbon dioxide: Carbon dioxide exits the body through the respiratory system. When we exhale, carbon dioxide is released from the lungs and expelled through the nose or mouth.
- Water: Water enters the body through drinking or eating foods that contain water. It is then absorbed by the digestive system and transported throughout the body via the circulatory system. Water exits the body through urine, sweat, and breathing.