Non-specific defence systems

• What should you be able to describe by the end of the video on nonspecific defense systems?

  The nonspecific defense systems of the human body
• What are the two main defense systems of the human body against pathogens?

  The nonspecific defense system and the immune system
• What is the primary job of the nonspecific defense system?

  To prevent pathogens from entering the human body
• What are the four main parts of the nonspecific defense system?

  1. Skin
  2. Nose
  3. Trachea and bronchi
  4. Stomach
• What forms a protective layer covering the body?

  The skin
• What is the outer layer of the skin made of, and why is it significant?

  It consists of dead cells, making it difficult for pathogens to penetrate
• What oily substance does the skin produce, and what is its function?

  Sebum, which can kill bacteria
• What happens when the skin is damaged?

  The skin scabs over to prevent pathogen entry
• What are some examples of body parts not covered by skin?

  Nostrils and mouth
• How does the nose help protect the body from pathogens?

  It contains hair and mucus that trap pathogens
• What are cilia, and what is their role in the respiratory system?

  Tiny hairs that trap pathogens and move mucus upwards
• What happens to mucus that traps pathogens in the respiratory system?

  It is moved upwards towards the throat and swallowed into the stomach
• How does the stomach defend against pathogens?

  It contains hydrochloric acid that kills pathogens
• What is a common disease caused by a pathogen that can be present on food?

  Salmonella food poisoning
• What can still happen even with nonspecific defense systems in place?

  Pathogens can still enter the body and cause serious disease
• What will be covered in the next video after discussing the nonspecific defense system?

  The immune system
• Where can students find questions on the nonspecific defense system?

  In the innovation workbook
• What should you be able to do after watching the video?

  Describe the nonspecific defense systems of the human body