Class Central is learner-supported. When you buy through links on our site, we may earn an affiliate commission.


Getting Under Our Skin

Ted-Ed via YouTube


What are those floaty things in your eye? - Michael Mauser.
What makes muscles grow? - Jeffrey Siegel.
What would happen if you didn’t drink water? - Mia Nacamulli.
What would happen if you didn’t sleep? - Claudia Aguirre.
How does anesthesia work? - Steven Zheng.
The benefits of good posture - Murat Dalkilinç.
Why are some people left-handed? - Daniel M. Abrams.
Why do women have periods?.
How your digestive system works - Emma Bryce.
Why sitting is bad for you - Murat Dalkilinç.
Why do we cry? The three types of tears - Alex Gendler.
Cell vs. virus: A battle for health - Shannon Stiles.
Is marijuana bad for your brain? - Anees Bahji.
The science of attraction - Dawn Maslar.
What makes tattoos permanent? - Claudia Aguirre.
Why do we itch? - Emma Bryce.
What happens during a heart attack? - Krishna Sudhir.
Debunking the myths of OCD - Natascha M. Santos.
How a wound heals itself - Sarthak Sinha.
How does asthma work? - Christopher E. Gaw.
How stress affects your body - Sharon Horesh Bergquist.
How blood pressure works - Wilfred Manzano.
What causes kidney stones? - Arash Shadman.
Why do your knuckles pop? - Eleanor Nelsen.
How do vitamins work? - Ginnie Trinh Nguyen.
At what moment are you dead? - Randall Hayes.
How does alcohol make you drunk? - Judy Grisel.
How to make a mummy - Len Bloch.
The immortal cells of Henrietta Lacks - Robin Bulleri.
Is it bad to hold your pee? - Heba Shaheed.
Which is better: Soap or hand sanitizer? - Alex Rosenthal and Pall Thordarson.
Why is it so hard to cure cancer? - Kyuson Yun.
The surprising reason our muscles get tired - Christian Moro.
What causes headaches? - Dan Kwartler.
The science of spiciness - Rose Eveleth.
How Do Pain Relievers Work? - George Zaidan.
Human sperm vs. the sperm whale - Aatish Bhatia.
How does caffeine keep us awake? - Hanan Qasim.
The surprising effects of pregnancy.
How the heart actually pumps blood - Edmond Hui.
How does your immune system work? - Emma Bryce.
The surprising reason you feel awful when you're sick - Marco A. Sotomayor.
What causes antibiotic resistance? - Kevin Wu.
Why do blood types matter? - Natalie S. Hodge.
How does your body process medicine? - Céline Valéry.
Why do some people go bald? - Sarthak Sinha.
How does laser eye surgery work? - Dan Reinstein.
The science of skin color - Angela Koine Flynn.
How long should your naps be? - Sara C. Mednick.
What causes body odor? - Mel Rosenberg.
Why do we hiccup? - John Cameron.
What is fat? - George Zaidan.
What’s that ringing in your ears? - Marc Fagelson.
What causes bad breath? - Mel Rosenberg.
What causes dandruff, and how do you get rid of it? - Thomas L. Dawson.
Which type of milk is best for you? - Jonathan J. O’Sullivan & Grace E. Cunningham.
Why do we have hair in such random places? - Nina G. Jablonski.
How does your brain respond to pain? - Karen D. Davis.
Why it’s so hard to cure HIV/AIDS - Janet Iwasa.
Why is yawning contagious? - Claudia Aguirre.
How aspirin was discovered - Krishna Sudhir.
What does the liver do? - Emma Bryce.
How do lungs work? - Emma Bryce.
What happens during a stroke? - Vaibhav Goswami.
How in vitro fertilization (IVF) works - Nassim Assefi and Brian A. Levine.
The surprising cause of stomach ulcers - Rusha Modi.
What causes constipation? - Heba Shaheed.
Your body vs. implants - Kaitlyn Sadtler.
How do glasses help us see? - Andrew Bastawrous and Clare Gilbert.
Oxygen’s surprisingly complex journey through your body - Enda Butler.
How does chemotherapy work? - Hyunsoo Joshua No.
What we know (and don't know) about Ebola - Alex Gendler.
How do ventilators work? - Alex Gendler.
You are your microbes - Jessica Green and Karen Guillemin.
What happens when your DNA is damaged? - Monica Menesini.
The dangers of mixing drugs - Céline Valéry.
Why is meningitis so dangerous? - Melvin Sanicas.
How does cancer spread through the body? - Ivan Seah Yu Jun.
Why do our bodies age? - Monica Menesini.
How do cancer cells behave differently from healthy ones? - George Zaidan.
How one scientist averted a national health crisis - Andrea Tone.
How your muscular system works - Emma Bryce.
Why do we have to wear sunscreen? - Kevin P. Boyd.
What happens when you get heat stroke? - Douglas J. Casa.
Is there a disease that makes us love cats? - Jaap de Roode.
The strange case of the cyclops sheep - Tien Nguyen.
How X-rays see through your skin - Ge Wang.
How do we smell? - Rose Eveleth.
What is a coronavirus? - Elizabeth Cox.
Why do humans have a third eyelid? - Dorsa Amir.
Why does your voice change as you get older? - Shaylin A. Schundler.
How do viruses jump from animals to humans? - Ben Longdon.
How do your kidneys work? - Emma Bryce.
The mystery of motion sickness - Rose Eveleth.
Eye vs. camera - Michael Mauser.
What causes opioid addiction, and why is it so tough to combat? - Mike Davis.
What makes tuberculosis (TB) the world's most infectious killer? - Melvin Sanicas.
What causes panic attacks, and how can you prevent them? - Cindy J. Aaronson.
Is human evolution speeding up or slowing down? - Laurence Hurst.
The mysterious science of pain - Joshua W. Pate.
What are stem cells? - Craig A. Kohn.
The science of stage fright (and how to overcome it) - Mikael Cho.
The evolution of the human eye - Joshua Harvey.
How menstruation works - Emma Bryce.
What is epigenetics? - Carlos Guerrero-Bosagna.
The past, present and future of the bubonic plague - Sharon N. DeWitte.
How do steroids affect your muscles— and the rest of your body? - Anees Bahji.
How do contraceptives work? - NWHunter.
Why are human bodies asymmetrical? - Leo Q. Wan.
How optical illusions trick your brain - Nathan S. Jacobs.
Does stress cause pimples? - Claudia Aguirre.
How to grow a bone - Nina Tandon.
How to sequence the human genome - Mark J. Kiel.
Why do we sweat? - John Murnan.
How do scars form? - Sarthak Sinha.
Why do we pass gas? - Purna Kashyap.
How mucus keeps us healthy - Katharina Ribbeck.
How does the thyroid manage your metabolism? - Emma Bryce.
Why is pneumonia so dangerous? - Eve Gaus and Vanessa Ruiz.
Secrets of the X chromosome - Robin Ball.
What is obesity? - Mia Nacamulli.
How does your body know what time it is? - Marco A. Sotomayor.
Who's at risk for colon cancer? - Amit H. Sachdev and Frank G. Gress.
Claws vs. nails - Matthew Borths.
Why do you need to get a flu shot every year? - Melvin Sanicas.
How close are we to eradicating HIV? - Philip A. Chan.
How do germs spread (and why do they make us sick)? - Yannay Khaikin and Nicole Mideo.
The accident that changed the world - Allison Ramsey and Mary Staicu.
What does the pancreas do? - Emma Bryce.
What is leukemia? - Danilo Allegra and Dania Puggioni.
What can DNA tests really tell us about our ancestry? - Prosanta Chakrabarty.
The fascinating science behind phantom limbs - Joshua W. Pate.
How this disease changes the shape of your cells - Amber M. Yates.
How did teeth evolve? - Peter S. Ungar.
How bones make blood - Melody Smith.
How fast is the speed of thought? - Seena Mathew.
How can we solve the antibiotic resistance crisis? - Gerry Wright.
Why do you get a fever when you're sick? - Christian Moro.
Can loud music damage your hearing? - Heather Malyuk.
Cell membranes are way more complicated than you think - Nazzy Pakpour.
What is HPV and how can you protect yourself from it? - Emma Bryce.
What are mini brains? - Madeline Lancaster.
How do blood transfusions work? - Bill Schutt.
Can you be awake and asleep at the same time? - Masako Tamaki.
How to master your sense of smell - Alexandra Horowitz.
What happens to your brain during a migraine - Marianne Schwarz.
How a few scientists transformed the way we think about disease - Tien Nguyen.
How do you know if you have a virus? - Cella Wright.
The effects of underwater pressure on the body - Neosha S Kashef.
The race to sequence the human genome - Tien Nguyen.
Which sunscreen should you choose? - Mary Poffenroth.
Why haven’t we cured arthritis? - Kaitlyn Sadtler and Heather J. Faust.
Why do people have seasonal allergies? - Eleanor Nelsen.
Learning from smallpox: How to eradicate a disease - Julie Garon and Walter A. Orenstein.
How do nerves work? - Elliot Krane.
The twisting tale of DNA - Judith Hauck.
Is DNA the future of data storage? - Leo Bear-McGuinness.
Why is it so hard to cure ALS? - Fernando G. Vieira.
What did dogs teach humans about diabetes? - Duncan C. Ferguson.
Do larger animals take longer to pee? - David L. Hu.
What causes seizures, and how can we treat them? - Christopher E. Gaw.
Could a blind eye regenerate? - David Davila.
RNAi: Slicing, dicing and serving your cells - Alex Dainis.
Hacking bacteria to fight cancer - Tal Danino.
The cancer gene we all have - Michael Windelspecht.
How breathing works - Nirvair Kaur.
How to 3D print human tissue - Taneka Jones.
What’s in the air you breathe? - Amy Hrdina and Jesse Kroll.
Performing brain surgery without a scalpel - Hyunsoo Joshua No.
How to see with sound - Jacques S. Abramowicz.
A curable condition that causes blindness - Andrew Bastawrous.
Could a breathalyzer detect cancer? - Julian Burschka.
Should you donate your DNA to help cure diseases? - Greg Foot.

Taught by



Start your review of Getting Under Our Skin

Never Stop Learning.

Get personalized course recommendations, track subjects and courses with reminders, and more.