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  2. Respiratory tract antimicrobial defense system - Wikipedia

    en.wikipedia.org/wiki/Respiratory_tract...

    In the first line of defense, inhaled bacteria are trapped by mucus and are swept toward the pharynx and are swallowed. [1] Bacteria which penetrate the mucous layer are dealt with a second line of defense which includes antimicrobial peptides that are secreted by the surface epithelium of the respiratory tract which kill many strains of ...

  3. Acid–base homeostasis - Wikipedia

    en.wikipedia.org/wiki/Acid–base_homeostasis

    The second and third lines of defense operate by making changes to the buffers, each of which consists of two components: a weak acid and its conjugate base. [ 5 ] [ 13 ] It is the ratio concentration of the weak acid to its conjugate base that determines the pH of the solution. [ 14 ]

  4. Immune response - Wikipedia

    en.wikipedia.org/wiki/Immune_response

    An immune response is a physiological reaction which occurs within an organism in the context of inflammation for the purpose of defending against exogenous factors. These include a wide variety of different toxins, viruses, intra- and extracellular bacteria, protozoa, helminths, and fungi which could cause serious problems to the health of the host organism if not cleared from the body.

  5. Immune system - Wikipedia

    en.wikipedia.org/wiki/Immune_system

    A scanning electron microscope image of a single neutrophil (yellow/right), engulfing anthrax bacteria (orange/left) – scale bar is 5 μm (false color). The immune system is a network of biological systems that protects an organism from diseases.

  6. Humoral immunity - Wikipedia

    en.wikipedia.org/wiki/Humoral_immunity

    Each immunoglobulin class differs in its biological properties and has evolved to deal with different antigens. [5] Antibodies are synthesized and secreted by plasma cells that are derived from the B cells of the immune system. An antibody is used by the acquired immune system to identify and neutralize foreign objects like bacteria and viruses.

  7. Detroit Lions defense: New-look secondary, improved line ...

    www.aol.com/detroit-lions-defense-look-secondary...

    The Detroit Lions open the regular season Sunday night against the Los Angeles Rams.. Here is a position-by-position look at the Lions’ defense and special teams for 2024: Defensive line. Head ...

  8. Respiratory system - Wikipedia

    en.wikipedia.org/wiki/Respiratory_system

    In humans and other mammals, the anatomy of a typical respiratory system is the respiratory tract.The tract is divided into an upper and a lower respiratory tract.The upper tract includes the nose, nasal cavities, sinuses, pharynx and the part of the larynx above the vocal folds.

  9. On position switch, defensive line drama, young corners and 5 ...

    www.aol.com/position-switch-defensive-line-drama...

    It remains a mystery why Davis was good enough as a pass rusher to have 8.5 sacks in his second year at Alabama but just two sacks over his final 26 games at Alabama and 1.5 in 46 games as a Dolphin.