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Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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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.

Body plan axes in animals and plants Body plan axes in animals and plants
Correct position when lifting a heavy object off the floor. Correct position when lifting a heavy object off the floor.
Olmsted, Vaux & Co., General plan of Riverside, Illinois. Olmsted, Vaux & Co., General plan of Riverside, Illinois.
Heart valves in closed position viewed from the top. Heart valves in closed position viewed from the top.
Farmers’ markets provide fresh, local produce to consumers Farmers’ markets provide fresh, local produce to consumers
Coelomate Body Plan: Earthworm Coelomate Body Plan: Earthworm
Video: Role of the respiratory system - effect of altered ventilation rates

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