Why are blood, bone and cartilage called connective tissue?

Blood, bone, and cartilage are called connective tissues because:

i) They are involved in the binding and connection of different tissues and organs.

ii) They help in providing structural rigidity, support and protection of the body.

iii) They are involved in the transport and exchange of various enzymes, hormones, gases and molecules such as nitrogenous wastes, vitamins, etc.