All of the following are examples of connective tissue EXCEPT:

Connective tissue is one of the four primary types of tissue found in the body, and it plays a crucial role in providing support, binding together, and protecting other tissues and organs. Examples of connective tissue include cartilage, blood, and bone, all of which are characterized by having scattered cells embedded in an extracellular matrix.

Cartilage is a firm but flexible supportive tissue, blood is classified as connective tissue because it contains cells suspended in a liquid matrix called plasma, and bone is a rigid connective tissue that provides structural support and protection for the body. Each of these has distinct functions and characteristics that align with the definition of connective tissue.

Skin, on the other hand, is an organ composed of multiple tissue types, including epithelial tissue (the outer layer) and connective tissue (which provides structural support beneath the epithelium). Therefore, while skin contains connective tissue, it is not purely a type of connective tissue itself. This distinction is key to understanding why skin is not considered an example of connective tissue in this context.