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People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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.
The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
![Intradermal drug administration: (a) cross section of skin showing depth of needle insertion Source:](https://biology-forums.com/gallery/47/medium_46687_08_12_14_4_59_34_19526512.jpeg)
![Intradermal drug administration: (b) the administration site is prepped Source: Pearson Education/PH](https://biology-forums.com/gallery/47/medium_46687_08_12_14_4_59_34_19527496.jpeg)
![In The Gross Clinic (1875), by Thomas Eakins, Professor Samuel Gross’s team of surgeons cuts through](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_14_05_22440772.jpeg)