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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

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About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Mechanism of transport by a transporter, also called a carrier. Mechanism of transport by a transporter, also called a carrier.
Climate change affects organisms and ecosystems Climate change affects organisms and ecosystems
Ancient Climate Change Ancient Climate Change
Classification of bones according to shape Classification of bones according to shape
A nerve cell (neuron) has extensions called dendrites A nerve cell (neuron) has extensions called dendrites
A commercially available DNA microarray, called a GeneChip, marketed by Affymetrix, Inc A commercially available DNA microarray, called a GeneChip, marketed by Affymetrix, Inc
Video: Cellular defenses (natural killer cells, phagocyte types & process of phagocytosis)

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