After drinking a few glasses of water on a hot day, you might be struck with a sudden, urge. Behind that feeling are two bean-shaped organs that work as fine-tuned internal sensors. This video details how the kidneys balance the amount...

Watch this movie from Kids Health to learn all about the urinary system including where pee comes from.

Learn the three major triggers for Renin production by the Juxtaglomerular cells. Rishi is a pediatric infectious disease physician and works at Khan Academy. [14:09]

Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee. [12:21]

See how Renin and ACE work to cut angiotensinogen down to size. [10:18]

Understand the structure and function of human kidneys. [7:58]

This lesson will identify the causes and affects of various kidney disorders. It is 1 of 5 in the series titled "Kidney Disorders and Health."

This lesson will identify the role of the kidneys in maintaining homeostasis in extracellular fluids. It is 2 of 3 in the series titled "Urinary Homeostasis."

This lesson will identify the role of the kidneys in maintaining homeostasis in extracellular fluids. It is 3 of 3 in the series titled "Urinary Homeostasis."

This lesson will identify the role of the kidneys in maintaining homeostasis in extracellular fluids.

This lesson will identify the major structures and functions of the urinary system. It is 1 of 4 in the series titled "Urinary System: Structure and Function."