Transcript disease
Chapter 11 Preventing Diseases Lesson 1 What Causes Disease? Click for: >> Main Menu >> Chapter 11 Assessment Teacher’s notes are available in the notes section of this presentation. Next >> disease A condition that affects the proper functioning of the body or mind communicable diseases Diseases that can be spread, such as colds noncommunicable Diseases that do not spread diseases pathogen A microscopic organism that causes communicable diseases viruses Tiny, nonliving particles that invade and take over healthy cells bacteria Extremely small single-celled organisms with no cell nucleus protozoa Single-celled organisms that have a nucleus fungi Primitive single- or many-celled organisms that cannot make their own food In this lesson, you will learn to identify the two main types of disease. recognize four common disease-causing organisms. describe how germs spread. Analyzing a Graphic Create a concept map that shows causes of communicable diseases. Use this diagram as a guide. Communicable Disease What Is a Disease? The science of fighting disease has come along way in the past hundred years. disease A condition that affects the proper functioning of the body or mind Types of Diseases The two basic categories of diseases are: Communicable diseases Noncommunicable disease communicable diseases Diseases that can be spread noncommunicable diseases Diseases that do not spread Germs that Cause Disease Pathogen is the scientific name for germ. pathogen A microscopic organism that causes communicable diseases Four Classes of Pathogens Viruses Bacteria Protozoa Fungi Germs that Cause Disease Some viruses are harmless and some cause diseases. viruses Tiny, nonliving particles that invade and take over healthy cells The common cold, the flu, the measles, and AIDS are examples of diseases caused by viruses. Germs that Cause Disease Bacteria is everywhere. bacteria Extremely small single-celled organisms with no cell nucleus Strep throat, Lyme disease, and tooth decay are examples of disease caused by bacteria. Germs that Cause Disease Protozoa can be harmless, but some strains can cause serious disease. protozoa Single-celled organisms that have a nucleus Malaria is an example of a disease caused by protozoa. Germs that Cause Disease Fungi survive by breaking down other living organisms and absorbing their nutrients. fungi Primitive single- or many-celled organisms that cannot make their own food Some strains of fungi, such as molds and yeasts cause disease. How Germs Are Spread Direct Contact (shaking hands) Eating or Drinking Contaminated Food or Water Germ Indirect Contact (sneezing) Contact with Animals or Insects Lesson 1 Review What I Learned Vocabulary Define pathogen. Use the word in a sentence. Lesson 1 Review What I Learned Recall Name a disease caused by a fungus. Lesson 1 Review What I Learned Identify Name four common disease-causing organisms. Lesson 1 Review Thinking Critically Explain What is the difference between a communicable disease and a noncommunicable disease? Lesson 1 Review Thinking Critically Apply At lunchtime, Maria offers Victoria a bite of her sandwich. Victoria remembers that Maria was coughing and sneezing earlier in the class. Should Victoria accept the bite of sandwich? Explain your answer. End of Chapter 11 Preventing Diseases Lesson 1 What Causes Disease? Click for: >> Main Menu >> Chapter 11 Assessment