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November 2018 Home Syllabus Announcements Modules Files Grades People Media Gallery My Media VoiceThread A.D.A.M Tutoring Bookstore DeVry Webex Evaluations Week 4 Introduction Welcome to Week 4!
Whenever you eat and drink, do you think about what happens during digestion? Do you ever wonder if the food you prepare for your family has all of the nutrients that promote good health? Like most people, you probably satisfy your hunger without much thought of how the body absorbs the nutrients in the food or where it goes after it leaves the stomach. But just how complex is consumption? In the last chapter on the cardiovascular system, you recall how blood transports oxygen and nutrients to the body cells. Together, these two vital ingredients allow metabolism to occur and your energy level to remain high. It is the digestive system, however, that breaks down complex nutrients so that they can enter the bloodstream. Substances that cannot be utilized are further broken down and excreted from the body. In the chapter on the lymphatic and immune system, you learned that the body has the ability to protect itself against harmful toxins. Similarly, the urinary system provides a mechanism that rids the body of a toxic waste substance. It ensures that important substances that are needed remain in the bloodstream, while nitrogenous byproducts filter into the urine, which then are excreted to the outside of the body. Understanding the complexity of these processes will help you as you learn new medical words, parts, and terms and relate them to the structure and function of each system. If you need to refresh yourself on the anatomy and physiology of these systems, remember to look at the A.D.A.M. Interactive Anatomy website with its anatomical models and animations. What are the steps involved in digestion once food enters the mouth? What organs are involved in ridding the body of nitrogenous waste?
- Spring '14