Why is blood classified as connective tissue?

Answer 1

Connective tissue is one of the four types of tissue in traditional classifications (the others being epithelial, muscle, and nervous tissue.) It is largely a category of exclusion rather than one with a precise definition, but all or most tissues in this category are similarly:

Involved in structure and support.
Derived from mesoderm (there are exceptions).
Characterized largely by the traits of non-living tissue.
Blood, cartilage, and bone are usually considered connective tissue, but because they differ so substantially from the other tissues in this class, the phrase "connective tissue proper" is commonly used to exclude those three. There is also variation in the classification of embryonic connective tissues; on this page they will be treated as a third and separate category.

Answer 2

Primarily because the living cells are surrounded by non-living, extra cellular matrix--the blood plasma. All living cells in connective tissue are surrounded by some nonliving matrix: collagen or hyalin fibers in cartilage and ligaments, calcium carbonate in bones, etc.

Answer 3

actually blood is not considered 'connective tissue proper'.it is a variation and as such does connect the different parts of the body in terms of transfer of nutrients and removal of metabolites and waste products and also exchange as in gases and heat. i think it is also because its a mesoderm derivative like other connective tissues proper eg. dense, areolar etc.

Answer 4

because it falls under the three classifications of a ground susbtance and fibers (collegen, elastic, reticular). it also has the same common embryonic origin of mesenchyme.