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Phospholipids have hydrophilic tail regions and hydrophobic head regions.
Total Abstinence
A commitment to completely foregoing certain behaviors or substances, often used in the context of avoiding alcohol or drugs.
Hormonal Implant
A small rod implanted under the skin that releases hormones to prevent pregnancy.
Birth Control
Methods or devices used to prevent pregnancy as part of family planning.
Life Expectancies
The average period that an individual is expected to live, based on statistical averages of age, gender, and other demographic factors.
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