https://en.wikipedia.org/wiki/Pulmonary_alveolus

A pulmonary alveolus is a hollow cavity found in the lung parenchyma, and is the basic unit of ... at the blood-air barrier. Although they only make up <5% of the alveolar surface, they are relatively numerous (60% of alveolar epithelial cells).

https://en.wikipedia.org/wiki/Blood%E2%80%93air_barrier

The blood–air barrier exists in the gas exchanging region of the lungs. It exists to prevent air bubbles from forming in the blood, and from blood entering the alveoli . It is formed by the type 1 pneumocytes of the alveolar wall, the endothelial ...

https://www.ncbi.nlm.nih.gov/pubmed/23441475

It is essential for efficient exchange of gases and for maintaining the structural integrity of alveoli. Surfactant is a secretory product, composed of lipids and ...

https://www.studyblue.com/notes/note/n/emt-ch-6-quizlet/deck/21195188

Study 73 EMT CH 6 QUIZLET flashcards from Zamir R. on StudyBlue. ... oxygen and carbon dioxide pass across the alveolar membrane in the lungs ... which layer of the skin is composed of fatty tissue and serves as an insulator for the body.

https://www.getbodysmart.com/respiratory-system/respiratory-system-anatomy

Oct 30, 2017 ... respiratory zone is found deep inside the lungs and is made up of the respiratory bronchioles, alveolar ducts, and alveoli. These thin-walled ...

https://en.wikibooks.org/wiki/Anatomy_and_Physiology_of_Animals/Respiratory_System/Test_Yourself_Answers

How does the structure of the alveoli make gas exchange efficient? The thin walls of the ... b) The diaphragm flattens and ribs move up and out. 10. What is the ...

https://opentextbc.ca/biology/chapter/20-4-transport-of-gases-in-human-bodily-fluids/

Once the oxygen diffuses across the alveoli, it enters the bloodstream and is ... Hemoglobin is made up of four symmetrical subunits and four heme groups.

https://www.visiblebody.com/learn/respiratory/5-functions-of-respiratory-system

Oxygen from inhaled air diffuses from the alveoli into pulmonary capillaries surrounding them. It binds to ... Breathing In and Speaking Out · Drawing In and ...

https://www.coursehero.com/file/p36pk0a/2-Conditions-such-as-pneumonia-and-lung-cancer-can-result-in-what-is-known-as-a/

A reduction in surface area decreases the total amount of alveolar epithelial surface ... dust and debris that become trapped in mucus out of the respiratory tract.

https://training.seer.cancer.gov/anatomy/respiratory/mechanics.html

... through the passages because of pressure gradients that are produced by contraction of ... Intraalveolar pressure is the pressure inside the alveoli of the lungs. ... Expiration (exhalation) is the process of letting air out of the lungs during the ...