LYMPATHIC SYSTEM

• The lymphatic system functions to drain, transport, and initiate immune responses, closely linking it with the cardiovascular system.
• Lymphatic vessels transport lipids and lipid-soluble vitamins (A, D, E, and K) absorbed by the gastrointestinal tract.
• Treatment for self-harm may involve therapy, medication, or both.
• Self-harm is a behavior where an individual injures themselves on purpose.
• Prevention of self-harm can involve education, support, and resources.
• Self-harm is often associated with mental health conditions such as depression, anxiety, and post-traumatic stress disorder.
• Self-harm can be a form of self-soothing or a way to express emotions.
• Lymphatic tissue initiates highly specific responses directed against particular microbes or abnormal cells.
• Lymphatic vessels resemble small veins in structure but have thinner walls and more valves.
• At intervals along the lymphatic vessels, lymph flows through lymph nodes, encapsulated bean-shaped organs consisting of masses of B cells and T cells.
• Lymphatic capillaries are avascular tissues (cartilage, epidermis, cornea of eye), CNS portions of the spleen, bone marrow, and lymphatic vessels begin as lymphatic capillaries.
• Lymphatic capillaries are found throughout the body except for the lymphatic trunks and ducts.
• Lymphatic organs include the lymph node, thymus, spleen, and lymphatic nodules such as tonsils.
• B cells create antibodies, also known as B lymphocytes, which bind to pathogens or foreign substances to neutralize them.
• B cells can also recruit other cells to help destroy an infected cell.
• T cells protect us from infection by wiping out infected or cancerous cells and directing the immune response by helping B lymphocytes to eliminate invading pathogens.
• Type I Anaphylactic ReactionAllergiesType II Cytotoxic ReactionType III Immune-Complex ReactionType IV Cell-Mediated ReactionAutoimmune DiseasesAn autoimmune disease occurs when the immune system fails to distinguish between healthy cells and foreign invaders.
• B Cell & T CellImmunityInnate ImmunityChemical Defenses Mechanical DefensesSkin, mucous membranes, tears, saliva, mucus, cilia, epiglottis, urine flow, defecating, vomitingSebum, lysozyme, gastric juiceInternal DefensesAntimicrobial proteins, Phagocytes, Natural killer cells, Inflammation, FeverAdaptive ImmunityAntigensAntigen ReceptorImmunogenicityReactivityEntire microbes or just parts of microbes may act as antigensPathway of Antigen ProcessingFor an immune response to occur, B cells and T cells must recognize that a foreign antigen is presentB cells can recognize and bind to antigens in l