The lungs and pulmonary system

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created 13 days ago by Renata_SidorukSołoducha
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https://www.khanacademy.org/science/high-school-biology/hs-human-body-systems/hs-the-circulatory-and-respiratory-systems/a/hs-the-respiratory-system-review https://www.khanacademy.org/science/high-school-biology/hs-human-body-systems/hs-the-circulatory-and-respiratory-systems/v/the-lungs-and-pulmonary-system https://www.abpischools.org.uk/topic/breathingandasthma/1/1 https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_Introductory_Biology_(CK-12)/13%3A_Human_Biology/13.35%3A_Respiratory_System_Organs
updated 13 days ago by Renata_SidorukSołoducha
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Respiratory systemThe body system responsible for gas exchange between the body and the external environment

card image

Respiratory systemThe body system responsible for gas exchange between the body and the external environment

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Pharynx (throat)

Tube connected the nose/mouth to the esophagus

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Larynx (voice box)

Tube forming a passage between the pharynx and trachea

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Bronchi

Branches of tissue stemming from the trachea

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Trachea

Tube connecting the larynx to the bronchi of the lungs

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Bronchiole

Airway that extends from the bronchus

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Alveoli

Structures of the lung where gas exchange occurs

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Diaphragm

Thoracic muscle that lays beneath the lungs and aids in inhalation/exhalation

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The process of physiological respiration includes two major parts: external respiration and internal respiration.

External respiration, also known as breathing, involves both bringing air into the lungs (inhalation) and releasing air to the atmosphere (exhalation). During internal respiration, oxygen and carbon dioxide are exchanged between the cells and blood vessels.

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External respiration,

also known as breathing, involves both bringing air into the lungs (inhalation) and releasing air to the atmosphere (exhalation).

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During internal respiration,

oxygen and carbon dioxide are exchanged between the cells and blood vessels.

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An important structure of respiration is the diaphragm.

When the diaphragm contracts, it flattens and the lungs expand, drawing air into the lungs. When it relaxes, air flows out, allowing the lungs to deflate.

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Respiration begins at the nose or mouth,

where oxygenated air is brought in before moving down the pharynx, larynx, and the trachea.

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The trachea branches into two bronchi,

each leading into a lung. Each bronchus divides into smaller bronchi, and again into even smaller tubes called bronchioles. At the end of the bronchioles are air sacs called alveoli, and this is where gas exchange occurs.