Functional Human Knee Joint Model Subcategory_Test Tubes Sixty-five-piece molecular model set with

Sixty-five-piece molecular model set with 32 atoms and 33 bonds for demonstrating bonding angles

Twelve-ball drilled set in a foam-lined plastic case with two each of aluminum

Pan balance demonstration lever with a low-friction brass pivot

and Newton's Third Law through one-dimensional elastic collisions along a 27-inch V-shaped track with five steel balls

Brass-wire conductor and seven plotting compasses on a clear base

Functional Human Knee Joint Model Subcategory_Test Tubes Sixty-five-piece molecular model set withFlexible joint allows the model to move through knee flexion and extension, demonstrating ligament engagement and meniscus function for sports medicine teaching.