This week on SciShow News: Animals! New research has found how dogs actually listen to us in more complex ways than you probably thought, and also figured out how a kind of pufferfish gets its puff up.

This week on SciShow News: Animals! New research has found how dogs actually listen to us in more complex ways than you probably thought, and also figured out how a kind of pufferfish gets its puff up.

How do your pupils work and why do some substances make them dilate?

Sphincters -- they're not just for butts! Hank explains the fascinating truth about these magic rings of muscle, where they appear in the human body and the pretty fantastic functions they perform in the animal kingdom.

Hank takes us through the bowels of the human digestive system and explains why it's all about surface area.

Keeping a muscle clenched usually tires it out eventually, but that’s not the case for sphincters, which do things a little differently.

A look at the biological functions that produce burps and farts. Biology - Human Body - Learning Points. Burps are caused when swallowed air forces open the stomach sphincter and travels up the oesophagus. Farts are caused when swallowed...

Urine is a waste product produced by humans and animals. Why is it yellow?
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Learning Points
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In this video, Jonathan from the Institute of Human Anatomy discusses 5 amazing muscles that have unique functions when compared to the typical skeletal muscle. Some of these muscles can protect the body and even make life a little bit...

This video explains the difference between acid reflux and GERD, the more severe form, and the damage it can cause to the digestive tract. It also shows the inside of the stomach and how the lower esophageal sphincter can cause acid to...

In this video, the speaker uses cadavers to explain the urinary system and answer the question of whether or not holding in urine can cause the bladder to rupture. He discusses the organs and structures involved in the urinary system,...

Achalasia | Pathophysiology, Causes, Signs & Symptoms, Diagnosis, Treatment



Achalasia is an acquired esophageal motility disorder that is caused by inability of the lower esophageal sphincter to relax. Multiple potential...

In this video, I discuss the following:<br/>
[1] anatomy of th<br/>e esophagus
[2] movement of a bolus of food through the esophagus, from the pharynx to the stomach

Gallbladder and neighbouring structures.

This nugget gives an overview of human excretory system, excretory products, urine formation and the process of micturation.

Healthy oesophagus and cardia, endoscopic view. The cardia is the junction between the oesophagus and the stomach..

Some of the biggest names in entertainment descended on New York City Monday (14 NOVEMBER) for the annual '24 Hour Plays on Broadway.

Two dozen actors took time out...