The surface morphology of eight sectors in the rabbit knee articular cartilage was studied using scanning electron microscopy. Cartilage surfaces showed wide variation in the shape, dimensions , and density of gaps and acellular processes. Patellas and load-bearing condyles revealed a relatively higher density of processes than did load-free condyles. Surface processes and gaps were abundant. They might represent a condensation product(s) of hyaluronic acid/protein complex that accrues during cycles of loading/weight bearing.
Levanon, Daniel and Stein, Haim
"The Articular Cartilage of the Rabbit Knee: A Scanning Electron Microscopy Study,"
Cells and Materials: Vol. 1
, Article 8.
Available at: https://digitalcommons.usu.edu/cellsandmaterials/vol1/iss3/8