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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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Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

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Green tea is able to stop the scent of garlic or onion from causing bad breath.

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The horizontal fraction bar was introduced by the Arabs.

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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.

Gram-positive and Gram-negative bacteria. Gram-positive and Gram-negative bacteria.
The gill-withdrawal reflex in the sea slug. The gill-withdrawal reflex in the sea slug.
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
Negative feedback loops affecting hypothalamic and anterior pituitary tropic hormones. Negative feedback loops affecting hypothalamic and anterior pituitary tropic hormones.
Gram-stained cervical smear. Note the gram-negative diplococci Neisseria gonorrhoeae ... Gram-stained cervical smear. Note the gram-negative diplococci Neisseria gonorrhoeae ...
Reinforcement Reinforcement
Video: Bulk flow - factors that influence bulk flow

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