Which type of tissue is most abundant in animals?

Which type of epithelium (on the basis of function) is present in :

(a) Sweat gland (b) Testis?

Which type of epithelium is present in the organs where exchange of substances takes place?

Give one example of connective tissue in which matrix is soilid?

Which type of connective tissue is present in hump of camel and blubber of whale?