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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

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Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

International Television Viewing Rates in Childhood In most developed countries, children watch TV International Television Viewing Rates in Childhood In most developed countries, children watch TV
Children make a fast adjustment to a new culture, although, as with these Hmong children in ... Children make a fast adjustment to a new culture, although, as with these Hmong children in ...
Children with autism generally prefer interacting with objects over people. Children with autism generally prefer interacting with objects over people.
Specific Nutrients and Behaviors Are Important during the First Trimester Specific Nutrients and Behaviors Are Important during the First Trimester
Distribution of sex chromosomes from generation to generation. All children receive an X chromosome Distribution of sex chromosomes from generation to generation. All children receive an X chromosome
Recommended Immunization Schedule for Children Recommended Immunization Schedule for Children
Video: Role of complement proteins

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