The process of intake of nutrients and its utilization by an organism is called nutrition.
Nutrient
Nutrient is a substance that provides nourishment essential for the maintenance of life and for growth.
Proteins
Proteins are the macromolecules formed by bonding together many amino acids.
Cellular respiration
Glucose, a type of carbohydrates is oxidized step by step in the cells for production of energy in the form of ATP. This is called as cellular respiration.
Aerobic respiration
Aerobic respiration is the process of producing cellular energy involving oxygen.
Glycolysis
Aerobic respiration is the process of producing cellular energy involving oxygen.