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Lymphatic System

Lymphatic System. Functions: Returns fluids to the cardiovascular system Houses and transports lymphocytes Transport lipids Consists of: Lymph (the fluid) Vessels (capillaries, collecting vessels, trunks, ducts) Leukocytes Tissues (including MALT)

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Lymphatic System

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  1. Lymphatic System • Functions: • Returns fluids to the cardiovascular system • Houses and transports lymphocytes • Transport lipids • Consists of: • Lymph (the fluid) • Vessels (capillaries, collecting vessels, trunks, ducts) • Leukocytes • Tissues (including MALT) • Organs (nodes, tonsils, spleen, thymus)

  2. Immunity Two parts working together: Nonspecific (Innate) Immunity & Specific (Adaptive) Immunity • Nonspecific Defenses – Present at Birth • Designed to prevent any pathogenic microbes • from entering or growing inside body • First Line of Defense • Skin • Mucous Membranes • Other (tears, saliva, sebum, acidity) • Second Line of Defense • Cells (Phagocytes, Non-phagocytes) • B. Inflammation • C. Antimicrobial Proteins (Complement, Interferon) • D. Fever

  3. Immunity (Cont.) • Specific Defenses – Develops due to memory cells • after an immune response Designed to prevent • harm to the body from a exposure to specific • pathogens • Humoral (Antibody-Mediated) = • production of antibodies by B cells • (particularly good for microbes in • body fluids) Antibodies circulate in body fluids and bind to antigens marking them for destruction

  4. Immunity (Cont.) Specific Defenses (cont.) Cellular (Cell-Mediated) = T cells directly attack the microbe (particularly good for microbes hiding inside cells

  5. Digestive System Processes:

  6. Digestive System (cont.) Mechanically digestion (mastication) & chemical digestion (starch) Secretes saliva into mouth which starts break down of starch Mechanically digestion (churning) & chemical digestion (protein) Produces bile & secretes it to gallbladder Stores bile & secretes it to duodenum Secretes enzymes into the duodenum Uses brush border enzymes, pancreatic enzymes and bile to chemically digest food, absorbs nutrients Absorbs water & vitamins and eliminates wastes

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