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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
Eighteen-year-olds were the largest age cohort in the first year of the war in both armies. Soldiers
Cystic fibrosis is caused by a mutation in a protein called CFTR
A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin
A nerve cell (neuron) has extensions called dendrites