Final answer:
Water plays a significant role in the absorption of food, temperature regulation, and digestion by facilitating the breakdown of food, aiding in perspiration, and assisting in the digestion process. However, it does not directly contribute to night vision.
Step-by-step explanation:
Water performs several critical functions in the human body, of which absorption of food, temperature regulation, and digestion are included. Water facilitates the breakdown and absorption of food substances, such as carbohydrates, proteins, lipids, and nucleic acids, as well as vitamins and minerals. It also plays a crucial role in the digestion process.
Water is significant in temperature regulation. Through processes such as perspiration, the body can maintain a constant temperature. When the body's temperature rises, the water stored in the body surfaces as sweat, evaporates, and cools down the body.
Water is not directly involved in improving night vision. That function is primarily associated with vitamin A and the photosensitive cells in the eyes.
Learn more about Functions of Water in the Body