There are 60,000 miles of blood vessels in every adult human.
Did you know?
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.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Nature
Polar Nature of Water Molecules
NATURE`S BEAUTY
Descartes’ Theory
Which of the following statements is true of linkage?