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Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Types of selective media Types of selective media
(a) Masai from East Africa have body types adapted to warm climates. (a) Masai from East Africa have body types adapted to warm climates.
Various types of bandages. Various types of bandages.
Labeled diagram and flowchart of the three muscle tissue types. Labeled diagram and flowchart of the three muscle tissue types.
Types of Hypersensitivities Types of Hypersensitivities
Structures of four common types of DNA-binding motifs from eukaryotic transcription factors Structures of four common types of DNA-binding motifs from eukaryotic transcription factors
Video: Mendel's pea plant, Pisum sativum experimental

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