Your thyroid is a tiny gland in your throat, and what it lacks in size, it makes up for in power. This thing controls your metabolism, so you literally can't have power without it. And unfortunately, there's a lot that can go wrong...

Paul Andersen explains the major elements in the endocrine system. He explains how glands produce hormones which target cells. He differentiates between water soluble and lipid soluble hormones. He then describes the hormones and...

If you hear the word “baby-faced” you might picture a doe-eyed celebrity who never seems to age. But, really, you should be thinking of the axolotl. However, it is possible to transform these otherwise forever-babies, causing them to...

Radiation sickness been portrayed in movies and television for more than 50 years. And those portrayals vary a lot. But if there’s one thing pretty much all these portrayals have in common, it’s that they get radiation sickness wrong—at...

Hank introduces us to the framework of our bodies, our skeleton, which apart from being the support and protection for all our fleshy parts, is involved in many other vital processes that help our bodies to function properly.

The new breed of high-tech self-monitors (measuring heartrate, sleep, steps per day) might seem targeted at competitive athletes. But Talithia Williams, a statistician, makes a compelling case that all of us should be measuring and...

Paul Andersen explains the major elements in the endocrine system. He explains how glands produce hormones which target cells. He differentiates between water soluble and lipid soluble hormones. He then describes the hormones and actions...

Studies suggest that if you made full-body scans part of your regular routine, you’d find a bunch of cancers over the years, but it wouldn't change your odds of having a life-threatening cancer. This is mostly because our definition of...

Explore the endocrine system with the Amoeba Sisters! This video briefly discusses endocrine vs exocrine before showing major endocrine glands and discussing examples of hormones released by each gland. Video also provides an example of...

If you hear the word “baby-faced” you might picture a doe-eyed celebrity who never seems to age. But, really, you should be thinking of the axolotl. However, it is possible to transform these otherwise forever-babies, causing them to...

Nestled in the tissues of your neck is a small, unassuming organ that wields enormous power over your body: the thyroid. Emma Bryce explains how the thyroid, like the operations manager in a company, is tasked with making sure that all...

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.

Paul Andersen describes four important homeostatic loops in biology. He begins with a brief description of the elements of a homeostatic loop. He then describes how the hypothalamus helps us maintain a stable internal body temperature....

Over our lifetimes, our bodies undergo a series of extraordinary metamorphoses: we grow, experience puberty, and many of us reproduce. Behind the scenes, the endocrine system works constantly to orchestrate these changes. Emma Bryce...

In the second half of our look at the endocrine system, Hank discusses chemical homeostasis and hormone cascades. Specifically, he looks at the hypothalamus-pituitary-thyroid axis, or HPT axis, and all the ways your body can suffer...

Paul Andersen describes the important features of the skeletal system. He starts by comparing and contrasting endoskeletons and exoskeletons. He then explains how the human skeleton provides support, movement, storage, blood production...

Howcast - You can increase your chances of staying alive if you know how to decrease your exposure to radiation.

Howcast -Learn how to lose weight on a vegetarian diet from Carolyn Dean, M.D. in this Howcast video.

Cute, cuddly red panda cub, Oolong, was born at about half the weight of a typical cub. Doctors soon realized his diagnosis of hyperthyroidism would mean lots of extra care and special treatment for his development.

This little guy was born at about half the weight of a typical cub. Doctors soon realized his diagnosis of hyperthyroidism would mean lots of extra care and special treatment for his development.

A new birth is always cause for a celebration. But unfortunately for Oolong, the celebration had to be put on hold.

Cute, cuddly red panda cub, Oolong, was born at about half the weight of a typical cub. Doctors soon realized his diagnosis of hyperthyroidism would mean lots of extra care and special treatment for his development.

This little guy was born at about half the weight of a typical cub. Doctors soon realized his diagnosis of hyperthyroidism would mean lots of extra care and special treatment for his development.

Cute, cuddly red panda cub, Oolong, was born at about half the weight of a typical cub. Doctors soon realized his diagnosis of hyperthyroidism would mean lots of extra care and special treatment for his development.