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Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Lungs: RUL = Right Upper Lobe, RML = Right Middle Lobe, RLL = Right Lower Lobe, LUL = Left Upper Lob Lungs: RUL = Right Upper Lobe, RML = Right Middle Lobe, RLL = Right Lower Lobe, LUL = Left Upper Lob
The female reproductive system, sagittal view showing organs of the system in relation to the urinar The female reproductive system, sagittal view showing organs of the system in relation to the urinar
Anatomy of the Right Knee Joint, Anterior View Anatomy of the Right Knee Joint, Anterior View
Anterior view of muscles of the human body Anterior view of muscles of the human body
Skin structure. Three-dimensional view of the skin, subcutaneous tissue, glands, and hairs Skin structure. Three-dimensional view of the skin, subcutaneous tissue, glands, and hairs
Video: ribosome

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