The Executive Branch is comprised of the President and his Cabinet (Secretaries). Secretaries serve as the heads of government departments. Departments, commissions, and agencies are responsible for interpreting the laws passed by Congress and administering government programs created by those laws.he Executive Branch is comprised of the President and his Cabinet (Secretaries). Secretaries serve as the heads of government departments. Departments, commissions, and agencies are responsible for interpreting the laws passed by Congress and administering government programs created by those laws.
The liver also filters harmful substances from the blood. Phagocytic cells in the liver, called Kupffer cells, remove large amounts of debris and bacteria. In addition, the liver stores important vitamins and minerals, including vitamins A, D, K, and B12.
Inside this tube is a lining called the mucosa. In the mouth, stomach, and small intestine, the mucosa contains tiny glands that produce juices to help digest food. There are also two solid digestive organs, the liver and the pancreas, which produce juices that reach the intestine through small tubes. 1  In addition, parts of other organ systems (for instance, nerves and blood) play a major role in the digestive system.