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

(a) Sweat gland (b) Testis?

Classify epithelial tissues on the basis of arrangements of layers.

Give one example each of

(a) Squamous epithelium; (b) Columnar epithelium.

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

Which type of tissue is most abundant in animals?