What Mechanical Engineers Do. Mechanical engineers develop and build mechanical devices for use in industrial processes. Mechanical engineering is one of the broadest engineering disciplines. Mechanical engineers research, design, develop, build, and test mechanical and thermal sensors and devices, including tools, engines, and machines.
Each tissue is with metabolic enzymes to release energy. Red blood cells do not have mitochondria . They get energy through glycolysis. Tissues like muscles have mitochondria . When muscles need energy mitochondria through mitochondria release more energy. Liver is the primary organ of metabolism. In liver carbohydrates, lipids and amino acids are metabolized. All tissues other than liver can metabolism carbohydrates fat and amino acids.
The liver is the second largest organ (after the skin) and is an accessory digestive gland which plays a role in the body's metabolism. The liver has many functions some of which are important to digestion. The liver can detoxify various metabolites; synthesise proteins and produce biochemicals needed for digestion.