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Did you know?

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

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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Bacterial cells of Staphylococcus aureus Bacterial cells of Staphylococcus aureus
The cells of eukaryotes (left) and prokaryotes (right) The cells of eukaryotes (left) and prokaryotes (right)
insect's compound eye, revealing photoreceptor cells, support cells and pigment cells insect's compound eye, revealing photoreceptor cells, support cells and pigment cells
Potential uses of stem cells Potential uses of stem cells
BLOOD CELLS BLOOD CELLS
The watery interior of cells The watery interior of cells
Video: Conjunctivitis

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