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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Root Systems of Eudicots and Monocots Root Systems of Eudicots and Monocots
Orangutans are limited to the islands of Sumatra and Borneo, where their numbers are rapidly declini Orangutans are limited to the islands of Sumatra and Borneo, where their numbers are rapidly declini
Systems of humans Systems of humans
The Circulatory and Lymphatic Systems Blood and lymph are fluids that circulate throughout the body The Circulatory and Lymphatic Systems Blood and lymph are fluids that circulate throughout the body
8.The following table contains DNA-sequence information compiled by Marilyn Kozak (1987). The ... 8.The following table contains DNA-sequence information compiled by Marilyn Kozak (1987). The ...
8.The following table contains DNA-sequence information compiled by Marilyn Kozak (1987). The ... 8.The following table contains DNA-sequence information compiled by Marilyn Kozak (1987). The ...
Video: Introduction to Autism

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