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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.
Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
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.
![Glaucoma. (a) A buildup of pressure within the eye cavities, often caused by a blockage of vessels t](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_36_55_93952400.jpeg)
![Hydronephrosis. Normal kidney (left) and kidney with hydronephrosis (right) are compared. Note the d](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_19_56_96622215.jpeg)