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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Possible phylogenies for early Homo. Possible phylogenies for early Homo.
School age (late childhood): 6–12 years, or to puberty. School age (late childhood): 6–12 years, or to puberty.
Performance Elements in the Art of Massage Performance Elements in the Art of Massage
Literacy Development in the Early Years: Helping Children Read and Write Literacy Development in the Early Years: Helping Children Read and Write
Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia). Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia).
Mechanisms of negative control of transcription Mechanisms of negative control of transcription
Video: Contraction cycle of a sarcomere

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