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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

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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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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

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There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Hydration is essential to body function, especially engaged in strenuous activities Hydration is essential to body function, especially engaged in strenuous activities
Abduction and Adduction Abduction–Moving a body part away from the middle. Adduction–Moving a body p Abduction and Adduction Abduction–Moving a body part away from the middle. Adduction–Moving a body p
Body Part, Method of Examination, and Equipment Used During the General Physical Examination Body Part, Method of Examination, and Equipment Used During the General Physical Examination
Nutrients in Foods and in the Body Nutrients in Foods and in the Body
Effects of Alcohol on the Body Effects of Alcohol on the Body
Posterior view of muscles of the human body Posterior view of muscles of the human body
Video: Rena arc construction

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