Blood Cells

MATERIALS NEEDED

textbook compound microscope prepared microscope slides of human blood (Wright's stain)

For Demonstration:

microscope slides borax (or similar cleaning agent)

sterile disposable blood lancets sterile absorbent cotton

70% alcohol slide staining rack and tray Wright's stain distilled water

For Optional Activity:

prepared slides of pathological blood, such as eosinophilia, leukocytosis, leukopenia, and lymphocytosis

SAFETY

• It is important that students learn and practice correct procedures for handling body fluids. Consider using either mammal blood other than human or contaminant-free blood that has been tested and is available from various laboratory supply houses. Some of the procedures might be accomplished as demonstrations only. If student blood is utilized, it is important that students handle only their own blood.

• Use an appropriate disinfectant to wash the laboratory tables before and after the procedures.

• Wear disposable gloves when handling blood samples.

• Clean end of a finger with 70% alcohol before the puncture is performed.

• The sterile blood lancet should be used only once.

• Dispose of used lancets and blood-contaminated items in an appropriate container (never use the wastebasket).

• Wash your hands before leaving the laboratory.

Blood is a type of connective tissue whose cells are suspended in a liquid intercellular substance. These cells are mainly formed in red bone marrow, and they include red blood cells, white blood cells, and some cellular fragments called platelets.

Red blood cells function to transport gases between the body cells and the lungs, white blood cells serve to defend the body against infections, and platelets play an important role in stoppage of bleeding (hemostasis).

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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