Do you have to be clean to be healthy?Not everything is a germ.How does your body function to keep you well?Your immune system can keep you healthy without being cleanFunctions of the Lymphatic SystemRecyclingRecycles fluid and proteins that diffuse from the blood capillaries during circulation back into the bloodstreamFighting IllnessAs lymph circulates through the body, white blood cells packed lymph nodes remove dangerous materials, including bacteria, cancer cells, and viruses from the body.Retrieving NutrientsLittle projections that extend into the small intestine absorb lipids from the digestive tract and shuttle them to the bloodstream.Your cells excrete waste, what happens to it?Lymphatic SystemInterstitial Fluid — between cellsIt then drains into the lymph vessels.All the waste between your cells get dumped back in your blood streamThoracic duct connects to a veinThe waste materials from each one of our cells goes through the lymphatic system, the circulatory system, and your excretory system in order to leave as urine.Waste gets pumped back into your bloodList the ways that your epithelial tissue keeps you well:Epithelium is anything that is exposed to the outside (ears, mouth, lungs, nose).Mucus in your nose is a defense mechanismSweat, salvia and tears are also antibacterialHair blocks things from entering your lungs and ears.Cilia sweeps particles out of the lungs.Acid kills invaders.Oils on the skin limit bacterial growth.11.12 The immune system contains a huge number of defensive elementsYour immune system protects against pathogens using a huge number and variety of defensesThese include:External barriersThe inflammatory responseComplement system proteinsWhite blood cells and the lymphatic system.LOOK OVER PowerPoint FOR CELL INFORMATION.11.13 Memory cells: Remembering the invaderAfter a primary immune response, your body produces memory cells.If the same invader is encountered again, memory cells instigate a secondary immune response that neutralizes the invader before it causes illness.Once exposed to an infectious disease, you may have a lifetime immunity against it.11.13 Vaccination: Outsmarting invadersVaccination (also called immunization) involves purposefully exposing the immune system to an antigen, which stimulates the production of memory cells.Modern vaccines are created from killed bacteria or viruses, or fragments of proteins from these microbes.11.14 Immune system malfunctions cause a variety of disordersproblems arise when the immune response is not strong enoughThese include:Severe combined immunodeficiencyImmunodeficiency diseases including AIDS.11.14 Immune system malfunctions cause a variety of disordersProblems can arise when the immune response is too strong.These include:AllergiesAutoimmune diseasesOrgan rejectionWhy would an immune system make a person sick? Does it make sense?When your immune system gets you sick, its not a disease you can get any other way.Study in 1980 in Venezuela90% of people living in the rainforest did not have allergies43% of people living in the cities had allergies.Maybe our immune systems attack things because they don’t have other things to attack.The Hygiene Hypothesis — we are keeping our environment too clean so that when our immune systems are developing they are not being challenged properly.BIO 101 1nd Edition Lecture 7 Outline of Last Lecture I. NeurotransmittersII. Action PotentialIII. Sensory ReceptorsIV. HormonesV. Endocrine SystemOutline of Current Lecture II. Functions of the Lymphatic SystemIII. Where does waste go?IV. Immune defense mechanismsV. VaccinationsVI. Immune System malfunctionsCurrent LectureQuiz on Thursday over videos and Ben’s bad day.  Do you have to be clean to be healthy?- Not everything is a germ.- How does your body function to keep you well?o Your immune system can keep you healthy without being clean Functions of the Lymphatic System- Recyclingo Recycles fluid and proteins that diffuse from the blood capillaries during circulation back into the bloodstream- Fighting IllnessThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o As lymph circulates through the body, white blood cells packed lymph nodes remove dangerous materials, including bacteria, cancer cells, and viruses from the body.- Retrieving Nutrientso Little projections that extend into the small intestine absorb lipids from the digestive tract and shuttle them to the bloodstream.  Your cells excrete waste, what happens to it?- Lymphatic System- Interstitial Fluid — between cellso It then drains into the lymph vessels. o All the waste between your cells get dumped back in your blood stream- Thoracic duct connects to a vein- The waste materials from each one of our cells goes through the lymphatic system, the circulatory system, and your excretory system in order to leave as urine. - Waste gets pumped back into your blood List the ways that your epithelial tissue keeps you well:- Epithelium is anything that is exposed to the outside (ears, mouth, lungs, nose).- Mucus in your nose is a defense mechanism - Sweat, salvia and tears are also antibacterial - Hair blocks things from entering your lungs and ears. - Cilia sweeps particles out of the lungs. - Acid kills invaders.- Oils on the skin limit bacterial growth.11.12 The immune system contains a huge number of defensive elements- Your immune system protects against pathogens using a huge number and variety of defenses- These include:o External barrierso The inflammatory responseo Complement system proteinso White blood cells and the lymphatic system.  LOOK OVER PowerPoint FOR CELL INFORMATION. 11.13 Memory cells: Remembering the invader- After a primary immune response, your body produces memory cells.- If the same invader is encountered again, memory cells instigate a secondary immune response that neutralizes the invader before it causes illness.- Once exposed to an infectious disease, you may have a lifetime immunity against it.  11.13 Vaccination: Outsmarting invaders- Vaccination (also called immunization) involves purposefully exposing the immune system to an antigen, which stimulates the production of memory cells.- Modern vaccines are created from killed bacteria or viruses, or fragments of proteinsfrom these microbes.  11.14 Immune system malfunctions cause a variety of disorders- problems arise