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Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Presynaptic and postsynaptic cells. Presynaptic and postsynaptic cells.
Mouse lung stained to visualize differentiated epithelial cells and macrophages Mouse lung stained to visualize differentiated epithelial cells and macrophages
Emiliania huxleyi cells in an electro-microscopic picture. Emiliania huxleyi cells in an electro-microscopic picture.
Nurse bees tending to brood in cells both open and capped with beeswax. Nurse bees tending to brood in cells both open and capped with beeswax.
Schematic diagram showing polyclonal response by B cells against linear epitopes. Schematic diagram showing polyclonal response by B cells against linear epitopes.
The Excretory System Water and waste products from cells The Excretory System Water and waste products from cells
Video: The pH scale - Strong acids and Weak acids

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