Chapter 43 Notes (Immune System)

Chapter 43 Notes (Immune System) - IMMUNE SYSTEM ORGANS...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
IMMUNE SYSTEM ORGANS •  LYMPH NODES- filter/trap foreign particles; store B & T cells •  SPLEEN- stores blood cells; removes antibody coated cells •  ADENOIDS (TONSILS)- trap bacteria/antigens •  BONE MARROW- stem cells make blood cells; B lymphocytes mature here •  THYMUS- produce and “educate” T lymphocytes  NON SPECIFIC INNATE IMMUNITY - born with ability; treats all pathogens same 1. FIRST LINE OF DEFENSE = EXTERNAL           ~   SKIN - epithelial tissues; flat with tight junctions protective barrier           ~  MUCOUS MEMBRANES - mucous; mouth, nose, anus openings           ~  CILIA  line respiratory tract to sweep out invaders           ~  MUCUS  traps invaders           ~  SECRETIONS •  SEBACEOUS (OIL) GLANDS – SEBUM trap dust/particles SWEAT GLANDS – pH 3-5; acidity is antibacterial                 •  HYDROCHLORIC ACID  in stomach (pH 2) kills most germs in food                 •  LYSOZYME-  enzyme in  SALIVA/TEARS  that digests bacterial cell walls 2. SECOND LINE OF DEFENSE – INTERNAL LEUKOCYTES (PHAGOCYTIC CELLS)  = WBC’s – engulf & digest invading bacteria             also destroy any damaged WBC/tissue = PUS                ~  NEUTROPHILS- 60-70% major eaters ~ MACROPHAGES –“ BIG” phagocytic cells ~ EOSINOPHILS- increase with infection by multicellular parasites; too big to eat;
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern