The stomach is a muscular sac that is important for absorbing food and preparing food for further digestion.
Metabolism is defined as the various biochemical processes that take place in any living being including human beings for maintaining life. Due to these biochemical processes any organism is allowed to grow, reproduce, repair damaged tissues and cells and respond to the external environment. There are two types of metabolic reactions that take place in the human body: anabolism, also known as constructive metabolism and catabolism, also known as destructive metabolism. Anabolism is a process in which chemical reactions occur to produce a complex compound from smaller components, usually consuming energy in the process. Catabolism is a process in which chemical reactions occur to break down a complex compound into smaller components and usually releases energy in the process. Anabolism, also referred to as biosynthesis helps the body to grow and make new cells. An example of anabolic reaction is bone growth and mineralization. During a catabolic reaction, larger molecules or polymers are broken down to form monomers. An example of a catabolic reaction is break down of complex carbohydrates such as starch into simple carbohydrates such as glucose.