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Crash Course (sometimes stylized as CrashCourse) is an educational YouTube channel started by John Green and Hank Green (collectively the Green brothers), who became known on YouTube through their Vlogbrothers channel. [2] [3] [4] Crash Course was one of the hundred initial channels funded by YouTube's $100 million original channel initiative.
This is an accepted version of this page This is the latest accepted revision, reviewed on 4 February 2025. American vlogger and entrepreneur (born 1980) This article is about the American vlogger and entrepreneur. For other people, see Henry Green (disambiguation). Hank Green Green in 2023 Born William Henry Green II (1980-05-05) May 5, 1980 (age 44) Birmingham, Alabama, U.S. Alma mater ...
Sabrina Marie Cruz (born April 22, 1998 [2]) is a Canadian YouTuber best known for her educational YouTube videos on her main channel, Answer in Progress, formerly known as NerdyAndQuirky, which she launched on January 6, 2012. [3]
In mammals, physiological respiration involves respiratory cycles of inhaled and exhaled breaths. Inhalation (breathing in) is usually an active movement that brings air into the lungs where the process of gas exchange takes place between the air in the alveoli and the blood in the pulmonary capillaries .
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The lower respiratory tract is also called the respiratory tree or tracheobronchial tree, to describe the branching structure of airways supplying air to the lungs, and includes the trachea, bronchi and bronchioles. [8] trachea. main bronchus (diameter approximately 1 – 1.4 cm in adults) [9] lobar bronchus (diameter approximately 1 cm)
Although total liquid ventilation (TLV) with completely liquid-filled lungs can be beneficial, [9] the complex liquid-filled tube system required is a disadvantage compared to gas ventilation—the system must incorporate a membrane oxygenator, heater, and pumps to deliver to, and remove from the lungs tidal volume aliquots of conditioned perfluorocarbon (PFC).
But Patrick had just left a facility that pushed other solutions. He had gotten a crash course on the tenets of 12-step, the kind of sped-up program that some treatment advocates dismissively refer to as a “30-day wonder.” Staff at the center expected addicts to reach a sort of divine moment but gave them few days and few tools to get there.