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Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Everyone has one nostril that is larger than the other.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Brain scans showing the white-matter pathways involved in everyday learning: Brain scans showing the white-matter pathways involved in everyday learning:
brain development in the human embryo brain development in the human embryo
Brain Cell Brain Cell
Acetylcholinergic Pathways in a Rat Brain Acetylcholinergic Pathways in a Rat Brain
Role of the Brain Stem in Hunger Role of the Brain Stem in Hunger
A rat pressing a lever to obtain rewarding brain stimulation. A rat pressing a lever to obtain rewarding brain stimulation.
Video: Protein digestion - stomach & small intestine

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