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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

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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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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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There are more bacteria in your mouth than there are people in the world.

Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants. Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants.
This image shows growing blood vessels in the retina of a mouse This image shows growing blood vessels in the retina of a mouse
Hyperopia (farsightedness). In the uncorrected top figure, the image would come into focus behind th Hyperopia (farsightedness). In the uncorrected top figure, the image would come into focus behind th
An MRI of Professor P.’s acoustic neuroma. The arrow indicates the tumor. An MRI of Professor P.’s acoustic neuroma. The arrow indicates the tumor.
Competitive enzyme immunoassay. (a) Shows the uninhibited reaction and (b) shows the inhibited ... Competitive enzyme immunoassay. (a) Shows the uninhibited reaction and (b) shows the inhibited ...
Relationship between inorganic and organic nitrogen metabolism Relationship between inorganic and organic nitrogen metabolism
Video: Anaphylaxis Animation

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