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Microscopy & Cells - Anatomy & Physiology

Control buttons has been changed to "navigation" mode.
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  • Base

    supports the microscope.

  • light source

    provides light for viewing the image.

  • light intensity knob

    adjusts the amount of light for viewing the image.

  • stage

    supports the slide being viewed.

  • stage knobs

    allow movement of the mechanical stage.

  • stage clips

    secure the slide in position for viewing.

  • stage aperture

    an opening in the stage that allows light to pass through to the specimen.

  • mechanical stage

    a movable stage that allows precise slide positioning.

  • condenser

    contains lenses that focus light onto the specimen.

  • iris diaphragm

    controls the amount of light passing through the specimen.

  • coarse focus knob

    moves the body tube up and down in large increments for gross focusing.

  • fine focus knob

    moves the body tube slightly to bring the image into sharp focus.

  • microscope arm

    supports the body tube of the microscope.

  • ocular lens (eyepiece)

    magnifies the image, usually by 10X.

  • objective lenses

    further magnify the image at different powers.

  • nosepiece

    holds the objective lenses and can be rotated to change magnification.

  • How is total magnification calculated on a compound microscope?
    Total magnification = ocular lens magnification × objective lens magnification.
  • What is the magnification of the ocular lens?
    The ocular lens magnifies by 10X.
  • How does working distance change with magnification?
    Working distance decreases as magnification increases, increasing risk of damaging the specimen or lens.
  • What is the benefit and drawback of high power lenses?
    Benefit: Enlarges images to see more detail. Drawback: Smaller field of view due to smaller aperture.
  • What is the basic unit of the body?

    The cell is the basic unit of the body.

  • How many different cell types are in the human body?
    There are about 200 different cell types in the human body.
  • What are cell organelles?
    Cell organelles are tiny structures within cells that carry out specific functions.