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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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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.

Herbivores of greatly different sizes can feed upon the same plant tissues. Though here we can see t Herbivores of greatly different sizes can feed upon the same plant tissues. Though here we can see t
Vasectomy. (a) Vas deferens is located within the spermatic cord on both sides. (b) A small incision Vasectomy. (a) Vas deferens is located within the spermatic cord on both sides. (b) A small incision
PET scan of the brain in a patient with Alzheimer’s disease. PET scan of the brain in a patient with Alzheimer’s disease.
(a) The Dmanisi cranium (right) shows similarities to early African H. erectus including the Narioko (a) The Dmanisi cranium (right) shows similarities to early African H. erectus including the Narioko
Amyloid plaques (stained blue) in the brain of a deceased patient who had Alzheimer’s disease. Amyloid plaques (stained blue) in the brain of a deceased patient who had Alzheimer’s disease.
Spirochete that Causes Lyme Disease Spirochete that Causes Lyme Disease
Video: Spinal Cord Injury Animation

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