Which of the following characters for connective tissues are correct?

(i) It is most abundant and widely distributed in the body of complex animals.

(ii) It includes cartilage, bone, adipose and blood.

(iii) Cells of blood, secrete fibres of structural proteins called collagen or elastin.

(iv) Matrix made up of modified polysaccharides.

(v) Areolar tissue present beneath the skin and it is a dense connective tissue.

(vi) Loose connective tissue contains fibroblasts, macrophages and mast cells.

(vii) Fibroblasts produce and secrete fibres.