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Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Micrographs of nerve cells taken with different types of light microscopes. Micrographs of nerve cells taken with different types of light microscopes.
(A) The levels of the spinal cord and spinal nerves. (B) Photograph of the spinal cord as it descend (A) The levels of the spinal cord and spinal nerves. (B) Photograph of the spinal cord as it descend
Gate Control Theory, Gate control, Open gate, Closed gate, Pain, Nerve transmission of pain, Pain ma Gate Control Theory, Gate control, Open gate, Closed gate, Pain, Nerve transmission of pain, Pain ma
Nerve involvement in tetanus and rabies. Nerve involvement in tetanus and rabies.
Eye movements with muscle and nerve coordination Eye movements with muscle and nerve coordination
First-order sensory neuron with free nerve endings First-order sensory neuron with free nerve endings
Video: Congenital Heart Defects Animation

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