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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.

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Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

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Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

The five different types of leukocytes (white blood cells). The five different types of leukocytes (white blood cells).
Anatomy of the heart. Remember: It is labeled right and left based on the patient’s perspective. Anatomy of the heart. Remember: It is labeled right and left based on the patient’s perspective.
Meiosis involves two complete divisional operations forming four potential sex cells. Meiosis involves two complete divisional operations forming four potential sex cells.
In oogenesis, cells enter meiosis as primary oocytes In oogenesis, cells enter meiosis as primary oocytes
Stem cells Stem cells
Fossil Prokaryotic Cells Fossil Prokaryotic Cells
Video: How do the different types of chromatography work? (No Audio)

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