How does anesthesia work? - Steven Zheng

Duration: 4 minutes and 56 seconds
Published: December 07, 2015
Definition: HD
Views: 3.88 million
Channel: TED-Ed
Zedem Media Steven Zheng TED TED Ed TED-Ed TEDEducation anesthesia general anesthesia local anesthesia anesthesiology going under surgery how does anesthesia work how anesthesia works
View full lesson: http://ed.ted.com/lessons/how-does-anesthesia-work-steven-zheng

When under anesthesia, you can’t move, form memories, or — hopefully — feel pain. And while it might just seem like you are asleep for that time, you actually aren’t. What’s going on? Steven Zheng explains what we know about the science behind anesthesia.

Lesson by Steven Zheng, animation by Zedem Media.
Facebook Tweeter Google+
Download Links Convert to MP3
Click "Download Links" button to generate a download link for MP4, 3GP, WEBM, and M4A formats or click "Convert to MP3" to get the audio track of this video in MP3 format.

Related Videos


At what moment are you dead? - Randall Hayes (05:34)

TED-Ed · 3 years ago
View full lesson: http://ed.ted.com/lessons/at-what-moment-are-you-dead-randall-hayes For as far back as we can trace our existence, humans have been fascinated with death and resurrection. But is resurrection really possible? And what is the actual difference between a living creature and a dead body anyway? Randall Hayes delves into the scientific theories that seek to answer these age-old questions. Lesson by Randall Hayes, animation by Anton Bogaty.

How do pregnancy tests work? - Tien Nguyen (04:34)

TED-Ed · 2 years ago
View full lesson: http://ed.ted.com/lessons/how-do-pregnancy-tests-work-tien-nguyen Over-the-counter pregnancy tests give potentially life-changing results with a pretty high rate of accuracy. But how do they work? Tien Nguyen explains how each test performs a scientifically rigorous, multi-stage experiment that goes from start to finish in the time that it’ll take you to watch this video. Lesson by Tien Nguyen, animation by Andrew Foerster.

The surprising reason you feel awful when you're sick - Marco A. Sotomayor (05:01)

TED-Ed · 2 years ago
View full lesson: http://ed.ted.com/lessons/the-surprising-reason-you-feel-awful-when-you-re-sick-marco-a-sotomayor It starts with a tickle in your throat that becomes a cough. Your muscles begin to ache, you grow irritable, and you lose your appetite. It’s official: you’ve got the flu. It’s logical to assume that this miserable medley of symptoms is the result of the infection coursing through your body — but is that really the case? Marco A. Sotomayor explains what’s actually making you feel sick. Lesson by Marco A. Sotomayor, animation by Henrik Malmgren.

What are those floaty things in your eye? - Michael Mauser (04:05)

TED-Ed · 3 years ago
View full lesson: http://ed.ted.com/lessons/what-are-those-floaty-things-in-your-eye-michael-mauser Sometimes, against a uniform, bright background such as a clear sky or a blank computer screen, you might see things floating across your field of vision. What are these moving objects, and how are you seeing them? Michael Mauser explains the visual phenomenon that is floaters. Lesson by Michael Mauser, animation by Reflective Films.

Why do we itch? - Emma Bryce (04:44)

TED-Ed · 1 year ago
View full lesson: http://ed.ted.com/lessons/why-do-we-itch-emma-bryce The average person experiences dozens of individual itches each day. We’ve all experienced the annoyance of an inconvenient itch — but have you ever pondered why we itch in the first place? Is there actually an evolutionary purpose to the itch, or is it simply there to annoy us? Emma Bryce digs deep into the skin to find out. Lesson by Emma Bryce, animation by Sashko Danylenko.

How does asthma work? - Christopher E. Gaw (05:10)

TED-Ed · 1 year ago
View full lesson: http://ed.ted.com/lessons/how-does-asthma-work-christopher-e-gaw More than 300 million people around the world suffer from asthma, and around 250,000 people die from it each year. But why do people get asthma, and how can this disease be deadly? Christopher E. Gaw describes the main symptoms and treatments of asthma. Lesson by Christopher E. Gaw, animation by Zedem Media.

What causes bad breath? - Mel Rosenberg (04:14)

TED-Ed · 3 years ago
View full lesson: http://ed.ted.com/lessons/what-causes-bad-breath-mel-rosenberg Halitosis is a curse that has plagued humanity since ancient times. But what causes it, and why is it so universally terrifying? Mel Rosenberg outlines the basics of bad breath — and what you can do when it strikes you. Lesson by Mel Rosenberg, animation by Andrew Foerster.

Why do women have periods? (04:46)

TED-Ed · 2 years ago
View full lesson: http://ed.ted.com/lessons/why-do-women-have-periods A handful of species on Earth share a seemingly mysterious trait: a menstrual cycle. We’re one of the select few mammals on Earth that menstruate, and we also do it more than any other animal, even though it’s a waste of nutrients, and can be a physical inconvenience. So where’s the sense in this uncommon biological process? TED-Ed describes the history and evolution of menstruation. Lesson by TED-Ed, animation by TED-Ed.

What happens during a heart attack? - Krishna Sudhir (04:54)

TED-Ed · 1 year ago
View full lesson: http://ed.ted.com/lessons/what-happens-during-a-heart-attack-krishna-sudhir Approximately seven million people around the world die from heart attacks every year. And cardiovascular disease, which causes heart attacks and other problems like strokes, is the world’s leading killer. So what causes a heart attack? Krishna Sudhir examines the leading causes and treatments of this deadly disease. Lesson by Krishna Sudhir, animation by Chadwick Whitehead.

What makes muscles grow? - Jeffrey Siegel (04:20)

TED-Ed · 2 years ago
View full lesson: https://ed.ted.com/lessons/what-makes-muscles-grow-jeffrey-siegel We have over 600 muscles in our bodies that help bind us together, hold us up, and help us move. Your muscles also need your constant attention, because the way you treat them on a daily basis determines whether they will wither or grow. Jeffrey Siegel illustrates how a good mix of sleep, nutrition and exercise keep your muscles as big and strong as possible. Lesson by Jeffrey Siegel, animation by Brett Underhill.