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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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Everyone has one nostril that is larger than the other.

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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

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The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

The transcription of three different genes that are found in the same chromosome. The transcription of three different genes that are found in the same chromosome.
Magnetosomes found in the spirillum Magnetospirillum magnetotacticum. Magnetosomes found in the spirillum Magnetospirillum magnetotacticum.
Overview of material uptake and long-distance transport processes in plants Overview of material uptake and long-distance transport processes in plants
Permafrost is found in much of Northern Canada Permafrost is found in much of Northern Canada
(A) Normal spongy bone. (B) Spongy bone with osteoporosis, which is characterized by a loss of bone (A) Normal spongy bone. (B) Spongy bone with osteoporosis, which is characterized by a loss of bone
Material Balance over #3 Heat Exchanger Material Balance over #3 Heat Exchanger
Video: Hormonal regulation of pregnancy - week 1

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