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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

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Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Species richness increases with island size. Species richness increases with island size.
Superior view of heart valves illustrating position, size, and shape of each valve. Superior view of heart valves illustrating position, size, and shape of each valve.
Although males tend to be larger than females, the two overlap significantly in size. The size of a Although males tend to be larger than females, the two overlap significantly in size. The size of a
How to choose the right payment plan with changing conditions (Question 4) How to choose the right payment plan with changing conditions (Question 4)
The nuclear envelope is studded with pores, which allow exchange of materials The nuclear envelope is studded with pores, which allow exchange of materials
Changes in the size of the thoracic cavity during the respiratory cycle Changes in the size of the thoracic cavity during the respiratory cycle
Video: Definitions of stroke volume, preload definition & Factors influencing stroke volume

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