Hank fills us in on the endocrine system - the system of glands which produce and secrete different types of hormones directly into the bloodstream to regulate the body's growth, metabolism, and sexual development & function.

SciShow explains what really causes those popping sounds your joints make -- fluid dynamics, people! -- and what you should watch out for if you're a habitual knuckle-popper.

Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee.

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.

Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects.

Fossilized footprints have proved that human ancestors were already striding across the landscape 3.6 million years ago. But who started them on that path? What species pioneered this style of locomotion? Who was the first to walk?

Paul Andersen explains the importance and location of interstitial fluid. He describes both the hydrostatic and osmotic pressures that move fluid between the interstitial fluid and the capillary. He also explains the major function of...

A broken bone might seem worse than a sprain, but you'll get over it much more quickly.

Do lobsters feel pain? #shorts #science #SciShow

Human reproduction is complicated an 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 sex hormones affect oogenesis and...

There’s a question to consider that’s pretty daunting: what is life?

And to try to answer that question, three tools stand out as being especially useful: A book, some experiments, and the microscope! In this episode, Hank talks to...

Paul Andersen explains how organs work together to form organ systems and how organ systems work together to form organisms. The kidney and bladder work together to filter blood in the excretory system. The circulatory and respiratory...

Scientists often use the phrase “anatomically modern humans” to describe the point when our ancient ancestors looked like us. But when did humans become behaviorally modern?

Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex...

In this video Paul Andersen explains the structures and functions of seventeen major parts of the brain. He begins with a quick discussion of brain evolution and ends with a review of the major parts presented inside the brainstem,...

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 tissues;...

In this episode of Crash Course, Hank introduces you to the complex history and terminology of Anatomy & Physiology. -- Table of Contents: Anatomy: The Structure of Parts 2:34 Physiology: How Parts Function 3:50 Complementarity of...

Like Beat writers who composed their work by shredding and reassembling scraps of writing, artist Jean-Michel Basquiat used similar techniques to remix his materials. Pulling in splintered anatomy, reimagined historical scenes and...

Until the early 20th century, Tasmania was home to a very weird wolf-like creature. Except that it wasn't a wolf. Even though it looked like a wolf. How did that happen? Here's the science of convergent evolution!

Are penises as big of a deal as we think they are? In this episode of Crash Course Sex Ed, we break down the history, myths, and assumptions we’ve made about penises, from the “right” size to circumcision, and from erections to blue balls.

Science Kids Koalas - Anatomy, Habitat and “Crikey” Fun Facts

This video highlights the challenges facing the koala population in Australia, including habitat loss, urbanization, droughts, and disease. Despite these threats, efforts...

Science Kids Koalas - Anatomy, Habitat and “Crikey” Fun Facts

This video provides six fun and fascinating facts about koalas, highlighting their unique behaviors and characteristics. From their tree-hugging habits to their...

Science Kids Koalas - Anatomy, Habitat and “Crikey” Fun Facts

This video provides an engaging and informative overview of the unique and fascinating world of Australian koalas. From their habitat in eucalyptus trees to the different...

Science Kids Koalas - Anatomy, Habitat and “Crikey” Fun Facts

Koalas, known for their distinctive appearance and sedentary lifestyle, are solitary animals with unique features such as fingerprints and comb-like claws. These...