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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.

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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

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By definition, when a medication is administered intravenously, its bioavailability is 100%.

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Cyanide works by making the human body unable to use oxygen.

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About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

2006 Data:Top 25 Substances Involved in Human Exposures 2006 Data:Top 25 Substances Involved in Human Exposures
Human hnRNP A1 protein can cycle in and out of the cytoplasm, but human hnRNP C Human hnRNP A1 protein can cycle in and out of the cytoplasm, but human hnRNP C
Terrorism, Intelligence, and Homeland Security Terrorism, Intelligence, and Homeland Security
Bones of the Human Skull Bones of the Human Skull
A single cell from an early-stage human embryo A single cell from an early-stage human embryo
All human organ systems and their functions (Part 1) All human organ systems and their functions (Part 1)
Video: Retina

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