Conversation so far:
where is dense regular elastic connective tissue found
Dense regular elastic connective tissue are found in areas of the body where large amounts of tensile strength are required, like in ligaments, tendons and aponeurosis.
what are the fibers of dense connective tissue made of
The fibers of dense connective tissue are mainly composed of type I collagen.
how many types of dense connective tissue are there
There are two major categories of dense connective tissue, regular and irregular.

Question: what is the primary difference
Self-contained rewrite: what is the primary difference between regular and irregular dense connective tissue