Place the slide under the microscope. At low magnification (10x), identify the general pattern of the bone section. Structural Identification:

If your specific textbook uses a different topic for Lab 3, such as "The Human Knee-Jerk Reflex," the goal is to observe the involuntary contraction of the quadriceps muscle to demonstrate a simple reflex arc.

Strength is provided by the inorganic mineral salts (calcium and phosphorus), while the organic fibers (collagen) provide flexibility. The tubular structure of osteons ensures maximum strength with minimum weight.

Sketch a small area of the observed tissue. Label the Haversian canal , osteocytes , and bone matrix . III. Analysis Questions

Permanent slide of "Bone Tissue" (transverse or longitudinal section). Textbook and instructional diagrams. II. Procedure & Observations

Observe the concentric layers (lamellae) of mineralized matrix surrounding the central canal.