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Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Major structures of the human brain. Major structures of the human brain.
Schematic of typical animal cell depicting the various organelles and structures. Schematic of typical animal cell depicting the various organelles and structures.
Examining Retinal Structures, Fundoscopic Examination Examining Retinal Structures, Fundoscopic Examination
Comparison of the chemical structures of psilocybin and LSD. Psilocybin (left) is derived from a mu Comparison of the chemical structures of psilocybin and LSD. Psilocybin (left) is derived from a mu
Lacrimal structures of the eye. Lacrimal structures of the eye.
Summary of Structures of the Ear Summary of Structures of the Ear
Video: Factors that influence muscle tension - Sarcomere length and force, understretched and overstretched

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