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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.