The image depicts a transverse section fragment of the umbilical cord. It is formed by gelatinous tissue that:

• contains predominantly fibroblast lineage cells #1, #2, #3 in contact with one another due to long branching processes #1, #2, #3
• has an intercellular substance with a prevalence of amorphous component
• contains a lot of hyaluronic acid in the amorphous component (ground substance); this provides for its basophilic properties and the ability to bind a large amount of water
• has some fine collagen fibers, which are immersed into the ground substance; it is generally difficult to distinguish the fibers on a section

The umbilical cord surface is covered by an epithelium. The wall of a blood vessel includes smooth muscle cell bundles that are cut in longitudinal and transverse sections.