|
|
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.
Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
![Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_48_57_94081413.jpeg)
![Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_14_26_100251196.jpeg)