Xylem consists of mainly dead elements.

Cuboidal : Epithelial :: Cardiac : .............

(a) nervous (b) connective

(c) epithelia (d) muscular

Cork cells are dead cells so ......have no ......spaces and the cell walls are heavily thickened by the deposition of .............

Match the following

Fig A

Fig B

(a) Identify figures A and B

(b) .........epithelium forms the outer layer of the skin and lines cavities and ducts.

(c) ............epithelium consist of cells that are tall and pillar-like

(d) Which one allows diffusion of substances?