|
|
Did you know?
Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
Did you know?
Excessive alcohol use costs the country approximately $235 billion every year.
Did you know?
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
![An exceptionally well preserved trilobite from the Burgess Shale. The antennae and legs are preserve](https://biology-forums.com/gallery/47/medium_12359_29_04_12_6_01_26.jpeg)
![An emergency medical technician positions defibrillator paddles on the chest of a supine male patien](https://biology-forums.com/gallery/47/medium_14755_10_09_12_7_23_56_85331131.jpeg)