Specialized connective tissues are often referred to as connective tissue proper, which then gets further divided into different subtypes.

Here's why the term "specialized connective tissue" is less common:

* It's a broad term: "Specialized" implies a specific function, but there are many different types of connective tissue with unique characteristics.

* It's often redundant: Connective tissue itself is already specialized compared to other tissue types like epithelial or muscle tissue.

Here are some examples of connective tissue proper and their subtypes:

* Loose connective tissue:

* Areolar

* Adipose

* Reticular

* Dense connective tissue:

* Dense regular

* Dense irregular

* Cartilage:

* Hyaline

* Elastic

* Fibrocartilage

* Bone:

* Compact

* Spongy

* Blood:

* Plasma

* Formed elements (red blood cells, white blood cells, platelets)

* Lymph:

* Fluid similar to plasma but with less protein

Therefore, it's more accurate to use the specific terms for the different types of connective tissue rather than "specialized connective tissue."