Oxygen to the brain doesn't come from food. It's extracted from the air by the lungs and distributed by the blood stream.
thiamine
For plants, phosphorus is an important nutrient because they need it for cell division and growth. Without this nutrient, plants can exhibit signs of stunted roots and leaf problems. Two other important nutrients needed by plants are nitrogen and potassium.
The brain is composed of about 73% water. Water is essential for maintaining proper brain function, helping with nutrient and waste transport, and regulating temperature. Staying hydrated is important for optimal brain health and function.
The brain is needed because if you didn't have a brain you wouldn't be able to do anything!
carbohydrates and fats.
vitamin A
Water is an important nutrient because it is needed to hydrate your most important organs
Glucose.
The forgotten nutrient and the most important is water.
Nutrient - any substance in food that provides the necessary elements for life. They can be classified into macronutrients (needed in large quantities) and micronutrients (needed in smaller quantities). A balanced intake of nutrients is important for proper growth, development, and overall health.
Iron, calcium and folic acid are especially important during pregnancy.
Fat