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Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

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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.

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Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Pancreas. Pancreas.
The lacrimal aparatus secretes and drains tears, which moisten and lubricate eye The lacrimal aparatus secretes and drains tears, which moisten and lubricate eye
Relationship between the pancreas and the digestive system. Relationship between the pancreas and the digestive system.
Insulin, glucagon, and blood glucose. Insulin, glucagon, and blood glucose.
Actions of glucagon in liver that lead to a rise in blood glucose Actions of glucagon in liver that lead to a rise in blood glucose
The Accessory Organs The liver, gallbladder, and pancreas produce digestive secretions that flow The Accessory Organs The liver, gallbladder, and pancreas produce digestive secretions that flow
Video: Requirements for nervous signals

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