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Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

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Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

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There are 20 feet of blood vessels in each square inch of human skin.

Erythrocytes (red blood cells) moving through a capillary in single file. Erythrocytes (red blood cells) moving through a capillary in single file.
Massive amounts of wood are stored on the forest floor of old-growth temperate coniferous forests of Massive amounts of wood are stored on the forest floor of old-growth temperate coniferous forests of
EEG and Single-Cell Activity EEG and Single-Cell Activity
Single nucleotide polymorphisms (SNPs) are shown in red Single nucleotide polymorphisms (SNPs) are shown in red
Testcross of a single character Testcross of a single character
Summary of Single Variable Discrete Models Summary of Single Variable Discrete Models
Video: Sperm Formation

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