Browse Reference Articles
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Tooth enamel
Tooth enamel is the hardest and most highly mineralized substance of the body, and with dentin, cementum, and dental pulp is one of the four major parts of the ... > more -
Antiretroviral drug
Antiretroviral drugs are medications for the treatment of infection by retroviruses, primarily HIV. Different classes of antiretroviral drugs act at different stages of the HIV life cycle. ... > more -
Development of the urinary and reproductive organs
In human fetal development, the urinary and reproductive organs are developed from the intermediate ... > more -
Gastrointestinal tract
The gastrointestinal tract or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within multicellular animals which takes in food, digests ... > more -
Cell (biology)
The cell is the structural and functional unit of all living organisms, and is sometimes called the "building block of life." Some organisms, such as bacteria, are unicellular, consisting of a single ... > more -
Mad Cow Disease
Healthy Aging
Diseases and Conditions
Disorders and Syndromes
Sports Medicine
Chronic Illness
Transmissible spongiform encephalopathy
Transmissible spongiform encephalopathies (TSEs, also known as prion diseases) are a group of progressive conditions that affect the brain and nervous system of humans and animals and are transmitted ... > more
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