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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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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.

Species currently endangered in Canada include (a) the Burrowing Owl, Athene cunicularia; (b) Taylor Species currently endangered in Canada include (a) the Burrowing Owl, Athene cunicularia; (b) Taylor
Here are images of live zebrafish that were studied for genetics and head size to give insight into Here are images of live zebrafish that were studied for genetics and head size to give insight into
human body human body
Flowchart to determine if a species is autotroph, heterotroph, or a subtype Flowchart to determine if a species is autotroph, heterotroph, or a subtype
A human pedigree of the X-linked color-blindness trait A human pedigree of the X-linked color-blindness trait
Events in human fertilization. The light micrograph shows a fertilized human oocyte. Events in human fertilization. The light micrograph shows a fertilized human oocyte.
Video: Sister chromatids of a metaphase chromosome animation

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