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  2. Tracheid - Wikipedia

    en.wikipedia.org/wiki/Tracheid

    In radial section, two tracheids of a coniferous wood species are shown. A series of bordered pits are also appearing in each tracheid. A tracheid of oak shows pits along the walls. It has no perforation plates. Angiosperms have both tracheids and vessel elements. [1] A tracheid is a long and tapered lignified cell in the xylem of vascular ...

  3. Pulmonary function testing - Wikipedia

    en.wikipedia.org/wiki/Pulmonary_function_testing

    Pulmonary function testing (PFT) is a complete evaluation of the respiratory system including patient history, physical examinations, and tests of pulmonary function. The primary purpose of pulmonary function testing is to identify the severity of pulmonary impairment. [ 1 ]

  4. Air sac - Wikipedia

    en.wikipedia.org/wiki/Air_sac

    In birds, some temperature control occurs in the respiratory system. [16] Water vapor heats cool air during inhalation in the trachea, and increases its humidity. [16] The resulting evaporative water loss varies greatly and depends on several factors including air sac pressure and the subsequent rate of air flow through the trachea.

  5. Respiratory system - Wikipedia

    en.wikipedia.org/wiki/Respiratory_system

    The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary ...

  6. Impulse oscillometry - Wikipedia

    en.wikipedia.org/wiki/Impulse_oscillometry

    Impulse oscillometry (IOS), also known as respiratory oscillometry, forced oscillatory technique (FOT), or just oscillometry, is a non-invasive lung function test that measures the mechanical properties of the respiratory system, particularly the upper and intrathoracic airways, lung tissue and chest wall, usually during the patient's tidal breathing (the way someone breathes when they are ...

  7. Boomers are sad they may never be grandparents as fewer ... - AOL

    www.aol.com/finance/boomers-sad-may-never...

    5 minutes could get you up to $2M in life insurance coverage — with no medical exam or blood test 5 ways to boost your net worth now — easily up your money game without altering your day-to ...

  8. Functional residual capacity - Wikipedia

    en.wikipedia.org/wiki/Functional_residual_capacity

    Lung volumes. Functional residual capacity (FRC) is the volume of air present in the lungs at the end of passive expiration. [1] At FRC, the opposing elastic recoil forces of the lungs and chest wall are in equilibrium and there is no exertion by the diaphragm or other respiratory muscles.

  9. 2 men accused of operating drones 'dangerously close' to ...

    www.aol.com/2-men-arrested-hazardous-drone...

    The incident began Saturday around 4:30 p.m. local time when a police officer detected an unmanned aircraft system operating "dangerously close" to Logan International Airport, the statement said.