1 An actor is a person, organization, or external system that plays a role in one or more interactions with your system. 2  Actors are drawn as stick figures. 3  Associations. 4  Associations between actors and use cases are indicated in use case diagrams by solid lines.
Beauty benefits of walnut oil (Thinkstock photos/Getty Images) High in vitamins and proteins, walnut oil works wonders for your skin. Apart from eating walnuts, the use of it in the form of oil also helps your skin. They are known to be rich in fibre, Omega-3, protein and other vital minerals. Fights wrinkles.
Canola and flaxseed oils, flax seed and walnuts contain alpha-linolenic acid, or ALA. EPA and DHA predominate in the human retina and brain because they govern the activities of retinal cells and neurons. Omega-3 fatty acids promote cardiovascular health by reducing platelet aggregation and inflammation.