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  2. Flea - Wikipedia

    en.wikipedia.org/wiki/Flea

    Aphaniptera. Flea, the common name for the order Siphonaptera, includes 2,500 species of small flightless insects that live as external parasites of mammals and birds. Fleas live by ingesting the blood of their hosts. Adult fleas grow to about 3 millimetres (8 inch) long, are usually brown, and have bodies that are "flattened" sideways or ...

  3. Insect mouthparts - Wikipedia

    en.wikipedia.org/wiki/Insect_mouthparts

    The trophi, or mouthparts of a locust, a typical chewing insect: 1 Labrum. 2 Mandibles; 3 Maxillae. 4 Labium. 5 Hypopharynx. Examples of chewing insects include dragonflies, grasshoppers and beetles. Some insects do not have chewing mouthparts as adults but chew solid food in their larval phase.

  4. Tears - Wikipedia

    en.wikipedia.org/wiki/Tears

    Lysozyme does this by dissolving a layer in the outer coating, called peptidoglycan, of certain bacteria. It is a typical body fluid with salt content similar to blood plasma. Usually, in a 24-hour period, 0.75 to 1.1 grams (0.03–0.04-ounce avoirdupois) of tears are secreted; this rate slows with age. [2] Reflex tears

  5. Why do we cry? Experts explain the purpose of tears. - AOL

    www.aol.com/lifestyle/why-cry-experts-explain...

    She adds that crying is also an outlet that helps release stress hormones and reduce stress levels. Lastly, reflex tears are like the eyes’ windshield-wiper fluid, Caudle says. The eyes produce ...

  6. Natron - Wikipedia

    en.wikipedia.org/wiki/Natron

    Natron is a naturally occurring mixture of sodium carbonate decahydrate (Na 2 CO 3 ·10H 2 O, a kind of soda ash) and around 17% sodium bicarbonate (also called baking soda, NaHCO 3) along with small quantities of sodium chloride and sodium sulfate. Natron is white to colourless when pure, varying to gray or yellow with impurities.

  7. Cockroach - Wikipedia

    en.wikipedia.org/wiki/Cockroach

    Cockroaches are generalized insects with few special adaptations, and may be among the most primitive living Neopteran insects. They have a relatively small head and a broad, flattened body, and most species are reddish-brown to dark brown. They have large compound eyes, two ocelli, and long, flexible antennae.