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Did you know?

Your heart beats over 36 million times a year.

Did you know?

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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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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People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

A plaque is a clear area in which all bacteria have been lysed by phages A plaque is a clear area in which all bacteria have been lysed by phages
Phidippus johnsoni chelicera (green) and pedipalps (bottom) Phidippus johnsoni chelicera (green) and pedipalps (bottom)
Compression Occurs in vertebrae subjected to extreme stresses, as when one falls and lands on his or Compression Occurs in vertebrae subjected to extreme stresses, as when one falls and lands on his or
Chest CT scan. The stringy, cobweblike area indicates lung damage from smoking that has resulted in Chest CT scan. The stringy, cobweblike area indicates lung damage from smoking that has resulted in
The inguinal area. Take great care when applying deep pressure in this region The inguinal area. Take great care when applying deep pressure in this region
How to find the volume and surface area of any cylinder How to find the volume and surface area of any cylinder
Video: Mendel's Principles of Inheritance (Father of Genetics)

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