When swollen lymph nodes are caused by an infection, this is known as lymphadenitis (lim-fad-uh-NIE-tis). Rarely, swollen lymph nodes are caused by cancer. Your lymph nodes, also called lymph glands, play a vital role in your body's ability to fight off infections. They function as filters, trapping viruses, bacteria and other causes of illnesses before they can infect other parts of your body.
As a source of calories, proteins provide four Calories per gram. Proteins are made up of smaller building blocks called amino acids. Twenty amino acids make up all of the human proteins. Of these twenty amino acids, the body can produce only 12, but 8 must be incorporated into the diet.
Proteins are the nutrients needed for tissue growth and repair.  Their component amino acids are required as the building blocks of  new tissues.utrients are needed by the body for growth, repair, and maintenance. The three main types of nutrients are fats, proteins, and carbohydrates. Carbs are used as energy, protei â¦ ns are used for growth and repair, and fats are used as an energy source. + 2 others found this useful.