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Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

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In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Muscles of the head, neck, and face. Muscles of the head, neck, and face.
Neck and Occipital Ridge. Apply thumb compression across the area at the base of the big toe. One ... Neck and Occipital Ridge. Apply thumb compression across the area at the base of the big toe. One ...
The urinary system: Relationship of the kidneys to the vertebrae The urinary system: Relationship of the kidneys to the vertebrae
The cystic fibrosis protein is a membrane protein. The CFTR protein is located in the plasma membran The cystic fibrosis protein is a membrane protein. The CFTR protein is located in the plasma membran
Results of a cross involving two genes located on the same chromosome Results of a cross involving two genes located on the same chromosome
Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx. Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx.
Video: Depolarization of the SA node, Action potentials of the myocardium & ANS effects

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