
In this episode of Crash Course, Hank introduces you to the complex history and terminology of Anatomy & Physiology. Pssst… we made flashcards to help you review the content in this episode!... Read more »

What do you and a sack of batteries have in common? Today, Hank explains. Pssst… we made flashcards to help you review the content in this episode! Find them on the free... Read more »

We’re kicking off our exploration of muscles with a look at the complex and important relationship between actin and myosin. Your smooth, cardiac, and skeletal muscles create movement by contracting and releasing... Read more »

Today Hank kicks off our look around MISSION CONTROL: the nervous system. Pssst… we made flashcards to help you review the content in this episode! Find them on the free Crash Course... Read more »

Our final episodes of Anatomy & Physiology explore the way your body keeps all that complex, intricate stuff alive and healthy — your immune system. The immune system’s responses begin with physical... Read more »

Human reproduction is complicated and important, and it’s going to take a four-part series for us to cover it. Today, we’re kicking that off with the female reproductive system, starting with how... Read more »

Hank takes you on a tour of your two-part autonomic nervous system. This episode explains how your sympathetic nervous system and parasympathetic nervous system work together as foils, balancing each other out.... Read more »

In the penultimate episode of Crash Course Anatomy & Physiology, Hank explains your adaptive immune system. The adaptive immune system’s humoral response guards extracellular terrain against pathogens. Hank also explains B cells,... Read more »

We’ve reached the grand finale of our four-part series on human reproduction: BABIES! Today Hank walks you through the stages of pregnancy, beginning with how a zygote develops into blastomeres to a... Read more »

Next stop in our tour of your sensory systems? VISION. With a little help from an optical illusion, we take a look inside your eyes to try to figure out how your... Read more »