Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.
Did you know?
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
Evolutionary adaptation to a new environment via natural selection.
Adaptations to the Environment
Preparing a Urine Specimen for Microscopic Examination (for Classroom Evaluation Only)
Another question for grade 11 math
The PharmGKB Knowledge Pyramid
Two Cnidarian Body Plans