How are carbs built and broken down in the body?

Carbohydrates are primarily built in the body through a process called glycogenesis, where glucose molecules are linked together to form glycogen, which is stored in the liver and muscles. When energy is needed, glycogen is broken down into glucose through glycogenolysis. Additionally, carbohydrates are metabolized into glucose from dietary sources through digestion, where enzymes break down complex carbs into simple sugars. This glucose can then be utilized for energy or stored for future use.