Materials Needed

compound microscope lens paper microscope slides coverslips transparent plastic millimeter ruler slide of three colored threads medicine dropper dissecting needle (needle probe)

specimen examples for wet mounts methylene blue (dilute) or iodine-potassium-iodide stain

For Demonstrations:

micrometer scale stereomicroscope (dissecting microscope)

Because the human eye is unable to perceive objects less than 0.1 mm in diameter, a microscope is an essential tool for the study of small structures such as cells. The microscope usually used for this purpose is the compound microscope. It is called compound because it utilizes two sets of lenses: an eyepiece lens and an objective lens system. The eyepiece lens system magnifies or compounds the image reaching it after being magnified by the objective lens system. Such an instrument can magnify images of small objects up to about one thousand times.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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