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Illustration of an embolus floating in an artery. The embolus will become lodged in a blood vessel t
Laparoscopy. A lighted endoscope specialized for insertion into the abdomen, called a laparoscope, i
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Herniated disk. A herniated disk is a protrusion of the disk’s gelatinous center, called the nucleus
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Different forms of a gene are called alleles