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Did you know?

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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Polyploidy has been an important factor in the evolution of plants. Polyploidy has been an important factor in the evolution of plants.
Effects of growth rate on development. Effects of growth rate on development.
Change in Drawing Abilities from Early to Middle Childhood Drawings become more realistic as fine m Change in Drawing Abilities from Early to Middle Childhood Drawings become more realistic as fine m
A patient’s cognitive ability depends on his or her psychologic status, which is influenced by ... A patient’s cognitive ability depends on his or her psychologic status, which is influenced by ...
Climate change is an important vector for human diseases Climate change is an important vector for human diseases
Development of the Nervous System: Dorsal View Development of the Nervous System: Dorsal View
Video: Spermatogenesis Animation

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