医学英语视听说（第二版）卢凤香-Unit 1.pptxVIP

医学英语视听说(第二版)Unit One Integumentary SystemMedical English Communication: Listening and Speaking (2nd edition)1 ContentsPart I Introduction to the Integumentary SystemPart II Diseases Related to the Integumentary SystemPart III Celebrity and DiseasePart IV Medical Terminology Related to the Integumentary System2Part V Further Thinking Part IVideo: Introduction to the Integumentary System3 Think and TalkThe skin consists of two layers: the epidermis and the dermis. Beneath the dermis lies the hypodermis or subcutaneous fatty tissue. The skin has three main functions: protection, regulation and sensation. The skin is a stable but flexible outer covering that acts as barrier, protecting your body from harmful things in the outside world such as moisture, the cold and sun rays, as well as germs and toxic substances. The epidermis protects the body by keeping things that might be harmful out and keeping the things your body needs to function properly in. Bacteria, viruses, fungi and other infectious agents are kept out. Sebum produced by glands helps inhibit microbes to keep the skin waterproof, so that water and nutrients are kept in for the body to use.Reference4 Think and TalkSpecialized cells in the epidermis help protect your body, too. Melanocytes contain a pigment called melanin and are responsible for the skin tone or color. They can filter out ultraviolet (UV) radiation from the sun. Langerhans cells are part of the immune system. They act like guards and signal the body when they detect foreign substances, such as bacteria not usually found on the skin. Reference5 Task One: Blank Filling interface (2) insides(3) reveals (4) incorporates (5) glands Watch and Do(6) thickness (7) sensations(8) touch(9) seals(10) dermal 6 Task Two: Multiple ChoiceWatch and Do71. D 2. B 3. D 4. B 5. C Task Three: Description The skin makes up 16% of your physical weight, and is the largest organ in our body. Its main purpose is to keep our