SciShow
Why Don't Penguins' Feet Freeze?
How do they do it? Penguins standing on ice, not only for days, but their whole lives! And their feet don’t hurt like ours would. It has something to do with blood and an amazing twist that penguins have developed.
SciShow
Why Do I Have Varicose Veins?
Usually, the 160,000 kilometers of blood vessels in your body work incredibly smoothly. However, the forces of age, weight gain, and gravity can conspire to cause lumpy varicose veins.
SciShow
Viking Sunstones and Mummy Health Secrets
Today on SciShow news, dead person wisdom is helping enrich our understanding of the natural world - how did Vikings manage to be such awesome navigators? And is heart disease inherent in human beings? Scientists think mummies may have...
SciShow
Why Don't Penguins' Feet Freeze?
How do they do it? Penguins standing on ice, not only for days, but their whole lives! And their feet don’t hurt like ours would. It has something to do with blood and an amazing twist that penguins have developed.
SciShow
How Did We Figure Out What a Heart Attack Was?
Heart attacks are the number 1 cause of death worldwide in the 21st century, but we weren't sure what caused them until 1980.
TED Talks
TED: The boiling river of the Amazon | Andres Ruzo
When Andres Ruzo was a young boy in Peru, his grandfather told him a story with an odd detail: There is a river, deep in the Amazon, which boils as if a fire burns below it. Twelve years later, after training as a geoscientist, he set...
TED-Ed
TED-Ed: Why are sharks so awesome? - Tierney Thys
Sharks have been celebrated as powerful gods by some native cultures. And today, sharks are recognized as apex predators of the world's ocean. What is it that makes these fish worthy of our ancient legends and so successful in the seas?...
TED Talks
Dean Ornish: Your genes are not your fate
Dean Ornish shares new research that shows how adopting healthy lifestyle habits can affect a person at a genetic level. For instance, he says, when you live healthier, eat better, exercise, and love more, your brain cells actually...
Amoeba Sisters
Circulatory System and Pathway of Blood Through the Heart
Join the Amoeba Sisters in their introduction to the circulatory system and follow the pathway of blood as it travels through the heart! This video explains the importance of blood, arteries, and veins, and it also introduces basic heart...
TED Talks
TED: What a driverless world could look like | Wanis Kabbaj
What if traffic flowed through our streets as smoothly and efficiently as blood flows through our veins? Transportation geek Wanis Kabbaj thinks we can find inspiration in the genius of our biology to design the transit systems of the...
SciShow
What Causes Brain Freeze?
That terrible pain the befalls us when enjoying an icy treat! How does that happen? Is there a cure? Let Hank explain.
Crash Course
Blood Vessels, part 1 - Form and Function: Crash Course A&P
Now that we've discussed blood, we're beginning our look at how it gets around your body. Today Hank explains your blood vessels and their basic three-layer structure of your blood vessels. We're also going over how those structures...
TED-Ed
TED-ED: What happens during a stroke? - Vaibhav Goswami
Every two seconds, someone in the world has a stroke. One out of every six people will have a stroke at some point in their lives. Strokes deprive brain cells of oxygen and are one of the most common causes of death, and a leading cause...
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...
Bozeman Science
The Circulatory System
Paul Andersen surveys the circulatory system in humans. He begins with a short discussion of open and closed circulatory systems and 2,3, and 4-chambered hearts. He describes the movement of blood through the human heart and the blood...
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...
Science ABC
Air Conditioning Sickness: Can AC Make You Sick?
The cold air produced by ACs is not inherently harmful. However, you may start to see symptoms of air conditioning sickness if your AC fails to restrain the bacteria, mold, fungi, dander, etc., that are thriving in the air-conditioned...
Curated Video
Cholesterol
A type of lipid found in the tissues of humans and other animals. 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
Clever Thumbs
Our thumbs are complex instruments; we need big brains to control them. Are they the reason behind the evolution of superior human intelligence? Biology - Human Body - Learning Points. The evolution of our hands and our large brains are...
Curated Video
Dissection: Heart
We dissect and examine a cow\u2019s heart to show the position and function of different parts. This includes the coronary artery, ventricles, atria, pericardium and the thickness of the muscle tissue. Biology - Human Body - Learning...
Curated Video
The circulatory system – Odd one out
Four parts belonging to systems within the human body are shown, but which is the odd one out? Life processes - Body systems - The circulatory system A Twig Tidbit Film - Odd one out. The children have to work out which of four images is...
Curated Video
The Heart - Circulatory System
Explanation of the circulatory system. Life processes - Body systems - The circulatory system Learning Points The heart is a strong muscle that pumps blood throughout the body. Arteries and veins carry blood around the body. A Twig...
Curated Video
Heart transplant
The story of one man's life-saving heart transplant operation. Life processes - Body systems - The circulatory system Learning Points If the heart stops working oxygenated blood won't move around the body. Each heart beat pumps five...
Curated Video
Braving the Freeze: Protecting Your Body Against Extreme Cold
Explore effective ways to shield your body from severe cold conditions, as demonstrated during a harsh winter in Chicago with record low temperatures. Learn why our lips crack and fingers numb, and discover preventative measures from...