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  2. Sketch (drawing) - Wikipedia

    en.wikipedia.org/wiki/Sketch_(drawing)

    Sketches can be made in any drawing medium. The term is most often applied to graphic work executed in a dry medium such as silverpoint, graphite, pencil, charcoal or pastel. It may also apply to drawings executed in pen and ink, digital input such as a digital pen, ballpoint pen, marker pen, water colour and oil paint.

  3. Injector pen - Wikipedia

    en.wikipedia.org/wiki/Injector_pen

    Injector pens remove some of the complications of syringes by allowing the pen to be "pushed" against the skin at a 90-degree angle (removing the need to inject at a proper angle as is the case with syringes), as well as by replacing a long, thin plunger of a syringe with a simple button which is depressed and held to inject the dose. [2]

  4. Syringe - Wikipedia

    en.wikipedia.org/wiki/Syringe

    A syringe is a simple reciprocating pump consisting of a plunger (though in modern syringes, it is actually a piston) that fits tightly within a cylindrical tube called a barrel. The plunger can be linearly pulled and pushed along the inside of the tube, allowing the syringe to take in and expel liquid or gas through a discharge orifice at the ...

  5. Drawing - Wikipedia

    en.wikipedia.org/wiki/Drawing

    Leonardo da Vinci's Vitruvian Man (c. 1485) Accademia, Venice. Drawing is a visual art that uses an instrument to mark paper or another two-dimensional surface. The instruments used to make a drawing are pencils, crayons, pens with inks, brushes with paints, or combinations of these, and in more modern times, computer styluses with graphics tablets or gamepads in VR drawing software.

  6. List of pre-Columbian inventions and innovations of ...

    en.wikipedia.org/wiki/List_of_pre-Columbian...

    Planned city construction – ancient cities in Mexico–such as Teotihuacan and the Aztec capital of Tenochtitlan–incorporated planned city design, including streets laid out in a grid pattern. Plumbing – the Maya have been found to be the earliest inventors of plumbing in Mesoamerica, with the earliest example of a pressurized water ...

  7. Line art - Wikipedia

    en.wikipedia.org/wiki/Line_art

    Line art or line drawing is any image that consists of distinct straight lines or curved lines placed against a background (usually plain). Two-dimensional or three-dimensional objects are often represented through shade (darkness) or hue . Line art can use lines of different colors, although line art is usually monochromatic.

  8. Hypodermic needle - Wikipedia

    en.wikipedia.org/wiki/Hypodermic_needle

    A hypodermic syringe has the ability to retain liquid and blood in it up to years after the last use and a great deal of caution should be taken to use a new syringe every time. The hypodermic needle also serves an important role in research environments where sterile conditions are required.

  9. Instruments used in general medicine - Wikipedia

    en.wikipedia.org/wiki/Instruments_used_in...

    Hypodermic needle / Syringe: for injections and aspiration of blood or fluid from the body Infection control equipment: as in gloves, gowns, bonnets, shoe covers, face shields, goggles, and surgical masks for preventing nosocomial or healthcare-associated infection: Instrument sterilizer: to sterilize instruments in absence of an autoclave ...

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