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Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

This diagram shows a cross-section of a solar-type star. This diagram shows a cross-section of a solar-type star.
The vocal cords within the larynx, superior view from the pharynx. The vocal cords within the larynx, superior view from the pharynx.
Nose, nasal cavity, and pharynx: (A) nasal cartilages and external structure; (B) meatus and positio Nose, nasal cavity, and pharynx: (A) nasal cartilages and external structure; (B) meatus and positio
Cross-Section of a Banana Under a Microscope. Cross-Section of a Banana Under a Microscope.
A cross section of a lymph node. A cross section of a lymph node.
Frontal section of primary somatosensory area in right cerebral hemisphere Frontal section of primary somatosensory area in right cerebral hemisphere
Video: Endocytosis - pinocytosis, receptor mediated and Transcytosis

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