SciShow
Weird Places: Mexico's Giant Crystal Cave
SciShow explores a place that's as beautiful as it is dangerous: Mexico's Giant Crystal Cave, where chemistry has created the world's largest crystals -- but in an environment so hostile that you'd only survive a few minutes if you saw...
Crash Course
In Da Club - Membranes & Transport: Crash Course Biology
Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.
Curated Video
%$?# Allergies!
Springtime means the arrival of green grass, bright flowers, and buzzing bees. But for many of us, it's also about sneezing, watery red eyes, and a runny nose, thanks to allergies. In this week's video, you'll learn why we get allergies,...
TED-Ed
TED-ED: How the heart actually pumps blood - Edmond Hui
For most of history, scientists weren't quite sure why our hearts were beating or even what purpose they served. Eventually, we realized that these thumping organs serve the vital task of pumping clean blood throughout the body. But how?...
TED-Ed
TED-ED: How menstruation works - Emma Bryce
At this moment, three hundred million women across the planet are experiencing the same thing: a period. The monthly menstrual cycle that gives rise to the period is a reality that most women on Earth will go through in their lives. But...
SciShow
3 Animals That Breathe Through Their Butts
If you want to be able to breathe underwater, you're going to need to get creative. So some turtles, dragonfly nymphs, and sea cucumbers decided to use their butts.
Crash Course
Fluid Flow & Equipment: Crash Course Engineering #13
Today we’ll dive further into fluid flow and how we can use equipment to apply our skills. We explain Bernoulli’s Principle and the relationship between speed and pressure in certain flowing fluids. We’ll also discuss how to apply the...
MinuteEarth
Which Came First - The Rain or the Rainforest?
Which Came First - The Rain or the Rainforest
SciShow
Do You Have a Maximum Heart Rate?
Does your heart rate have an upper limit and could you ever reach it?
SciShow Kids
Swings, Slides, and Science | Physics for Kids
Did you know that when you’re soaring on the swings, or sliding down the slide, you’re taking part in some seriously cool science? Jessi explains the forces you can find at the playground!
Bozeman Science
The Importance of Oxygen
In this video Paul Andersen explains the importance of oxygen in accepting electrons. He begins with a brief description of combustion. He then explains the role of oxygen in aerobic cellular respiration.
Crash Course
The Heart, part 1 - Under Pressure: Crash Course A&P
Your heart gets a lot of attention from poets, songwriters, and storytellers, but today Hank's gonna tell you how it really works. The heart's ventricles, atria, and valves create a pump that maintains both high and low pressure to...
Crash Course
Circulatory & Respiratory Systems - CrashCourse Biology
Hank takes us on a trip around the body - we follow the circulatory and respiratory systems as they deliver oxygen and remove carbon dioxide from cells, and help make it possible for our bodies to function.
Crash Course
Blood, Part 2 - There Will Be Blood: Crash Course A&P
It's time to start talking about some of the terrible things you can do to your own body, like blood doping. We'll start by explaining the structure and function of your erythrocytes, and of hemoglobin, which they use to carry oxygen....
Bozeman Science
Mechanical and Electromagnetic Waves
In this video Paul Andersen compares and contrasts mechanical and electromagnetic waves. Both types of waves transfer energy through oscillations but mechanical waves requires a medium. Several examples of each type of wave are included.
TED-Ed
TED-Ed: How blood pressure works - Wilfred Manzano
If you lined up all the blood vessels in your body, they'd be 60 thousand miles long. And every day, they carry the equivalent of over two thousand gallons of blood to the body's tissues. What effect does this pressure have on the walls...
TED-Ed
TED-Ed: How a few scientists transformed the way we think about disease - Tien Nguyen
This video was created with support from the U.S. Office of Research Integrity: http://ori.hhs.gov. For several centuries, people though diseases were caused by wandering clouds of poisonous vapor. We now know that this theory is pretty...
Curated Video
The Amazon: The Lungs of the Earth
In this video, the Amazon rainforest is explored as a vital contributor to our planet's oxygen production, earning it the nickname "the lungs of the Earth." The video highlights the Amazon's diverse ecosystem, its heavy reliance on...
Curated Video
Operation Pluto: The World's First Offshore Pipeline in WWII
Operation Pluto was a groundbreaking engineering feat during World War II, where an offshore pipeline was laid across the English Channel to supply fuel to the Allied forces in Normandy. With innovative technology and secrecy, steel...
Curated Video
Revolutionary Cardiac Pacemaker Improves Heart Function and Saves Lives
This video highlights the life-changing impact of a new type of cardiac pacemaker called a biventricular pacemaker. By resynchronizing the heart's rhythms, this device helps those suffering from heart failure by ensuring the chambers...
Curated Video
Blood pressure
The pressure that blood exerts against the walls of blood vessels. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...
Curated Video
Active transport
The use of energy to move particles across a cell membrane from a lower concentration to a higher concentration. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
Curated Video
Heart
The heart powers everything you do. It pumps without you thinking about it, and beats over a billion times in an average lifetime. But how does it work? Biology - Human Body - Learning Points. The heart is the hardest working muscle in...