1 The right side of the heart receives oxygen-poor blood from body tissues and pumps it to the lungs where it picks up oxygen and gets rid of carbon dioxide. 2  The blood vessels that carry blood to and from the lungs form the pulmonary circuit.
According to the Dietary Guidelines for Americans 2015-2020, a healthy eating plan: 1  Emphasizes fruits, vegetables, whole grains, and fat-free or low-fat milk and milk products. 2  Includes lean meats, poultry, fish, beans, eggs, and nuts. 3  Is low in saturated fats, trans fats, cholesterol, salt (sodium), and added sugars.
Lean beef, pork, skinless chicken and turkey are all healthy sources of protein and contain tyrosine, an amino acid that assists brain activity and may also improve your mood. Lean meats are also a good source of vitamin B12, which helps to energize and may even combat conditions like insomnia and depression. 7. Eggs. Another protein-packed food.