Anatomy
Latest about Anatomy
![Respiratory system: A woman breathes into the cold as she takes a break from exercising.](https://cdn.mos.cms.futurecdn.net/gqJDouUgxJqKKsxsdrf2dj-320-80.jpg)
Respiratory system: Facts, function and diseases
By Kim Ann Zimmermann published
The respiratory system is responsible for taking in oxygen and expelling carbon dioxide. The main organs are the lungs, which work in concert with the cardiovascular system.
![Tooth sensitivity: Close up of a woman's mouth biting into a popsicle.](https://cdn.mos.cms.futurecdn.net/K5gSsUSJ2di9LuMUEmnnsT-320-80.jpg)
Tooth sensitivity: Causes and remedies
By Ashley P. Taylor, Jessie Szalay published
Tooth sensitivity is a common dental problem that involves discomfort or pain in teeth when encountering certain substances and temperatures.
![ears, ear anatomy](https://cdn.mos.cms.futurecdn.net/NvekX9tT7peSEUHRersaT8-320-80.jpg)
Ears: Facts, function & disease
By Alina Bradford published
The ears are complex systems that not only provide the ability to hear, but also make it possible to maintain balance.
![How many organs can you see in this human model?](https://cdn.mos.cms.futurecdn.net/KeGjibWsnpyTF2yBJL6wZh-320-80.jpg)
How many organs are in the human body?
By Dani Leviss published
There isn't an official "organ count" for the human body, but is there a ballpark estimate?
![Will this toothpaste make your smile shine?](https://cdn.mos.cms.futurecdn.net/AYgaRz9HbSoenR7wjbaCc6-320-80.jpg)
Does charcoal toothpaste really whiten teeth?
By Donavyn Coffey published
Activated charcoal can protect against some poisons, but can it help whiten your smile?
![Is this boy feeling pain from his periodontal ligament or his dental pulp?](https://cdn.mos.cms.futurecdn.net/SMRgPYGELYZ3KCqKu4PjzZ-320-80.jpg)
Why are teeth so sensitive to pain?
By Ashley P. Taylor published
Wouldn't it be easier if our teeth didn't feel pain?
![hand holding thermometer](https://cdn.mos.cms.futurecdn.net/CQWQb8KqFKmsxpMEV7SYR9-320-80.jpg)
Has the Average Human Body Temperature Always Been the Same?
By Nicoletta Lanese published
Evidence suggests that modern humans may be cooler than our 19th-century ancestors.
![A 3D illustration of the human skeletal system.](https://cdn.mos.cms.futurecdn.net/mGfKXFfhxXuLuoCT8ZnuxZ-320-80.jpg)
The Human Skeletal System
By Kim Ann Zimmermann published
Humans wouldn't get very far without bones — literally.
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