If cells and organs never talked to each other, an animal would fall apart faster than a boy band after the popular one goes solo. Thankfully, that’s where the nervous and endocrine systems come in! In this episode of Crash Course...

Explore 11 human body systems with the Amoeba Sisters in this updated video (2024). This video focuses on general functions for the following systems (and also provides a few structure examples): Circulatory, Digestive, Endocrine,...

Paul Andersen introduces Anatomy and Physiology in this podcast. He starts by describing how the form of an object fits the function. He then explains the themes of homeostasis and hierarchy. He describes the four major types of...

Neurons often get all the credit for running the brain, but the work done by Ben Barres at Stanford University proved that glial cells are far more crucial to brain functioning than we had previously realized.

With their squishy bodies and color-changing abilities, octopuses and other cephalopods already look like our planet’s resident aliens. But researchers have discovered yet another thing that separates them from most other animals on...

Jessi and Anthony have been helping Squeaks learn all about flying before his big airplane ride to the robot museum so he isn’t so nervous! Here’s everything they learned together!

As Squeaks continues to prepare for his big trip with Jessi, Mr. Brown helps him learn all about different kinds of wings and how they help animals and machines fly!

More women in America die from pregnancy-related complications than in any other developed country in the world, and black women are most affected. NewsHour Weekend's Ivette Feliciano reports on one clinic in Memphis, Tennessee, where...

Natural selection can lead to some pretty amazing adaptations, but sometimes the resulting traits aren’t the most efficient solutions to the problems at hand. With the bar set to “good enough,” here are some features that arose from...

Kings, scientists, and musicians alike have all been known to stutter. It can make speaking in front of crowds even more nerve-wracking, but is anxiety the root cause? Spoiler: probably not.

With their squishy bodies and color-changing abilities, octopuses and other cephalopods already look like our planet’s resident aliens. But researchers have discovered yet another thing that separates them from most other animals on Earth!

At this school in Tokyo, five-year-olds cause traffic jams and windows are for Santa to climb into. Meet: the world's cutest kindergarten, designed by architect Takaharu Tezuka. In this charming talk, he walks us through a design process...

When Allison Hunt found out that she needed a new hip -- and that Canada’s national health care system would require her to spend nearly 2 years on a waiting list (and in pain) -- she took matters into her own hands.

BAHHHHHH! Did I scare you? What exactly happens when we get scared? How does our brain make our body react? Just what are Neurotransmitters? In this episode of Crash Course Psychology, Hank takes us to the simplest part of the complex...

Have you ever wondered why your face turns red when you’re angry? Check out this SciShow Quick Question to learn why!

Neurons often get all the credit for running the brain, but the work done by Ben Barres at Stanford University proved that glial cells are far more crucial to brain functioning than we had previously realized.

Like all of us, economist Tyler Cowen loves a good story. But in this intriguing talk, he asks us to step away from thinking of our lives -- and our messy, complicated irrational world -- in terms of a simple narrative.

Humanity's fine-tuned sense of fear served us well as a young species, giving us laser focus to avoid being eaten by competing beasts. But it's less wonderful when that same visceral, body-hijacking sense of fear kicks in in front of 20...

Sometimes excitement can feel more like anxiety, and it turns out that they aren't that unrelated. Understanding the automatic reaction in our brains and changing our interpretation of the source might help us actually turn that anxiety...

Hank explains the science behind the "cinnamon challenge," and reveals why it is nearly impossible to complete.Do not attempt the cinnamon challenge! Instead, why not just watch some videos of the thousands of YouTubers failing at it!...

Squeaks has a doctor's appointment coming up and he's a little nervous, so Jessi asked her friend Dr. Arron Carroll to come over and talk about what happens when you visit the doctor!

For the introverts among us, traditional forms activism like marches, protests and door-to-door canvassing can be intimidating and stressful. Take it from Sarah Corbett, a former professional campaigner and self-proclaimed introvert. She...

Humans’ experiences with ventilators have taught us that sighing isn’t just a way to express yourself: it’s a vital part of our everyday breathing.

Which came first: the stress or the pimples? The physical reactions to stress can cause major breakouts, which, in turn, can be even more stressful! Claudia Aguirre gives just one more reason to get that stress under control.