Question

what are difference between epidermis and endodermis

Answer 1

Endodermis and epidermis are two cell layers found in the stem and root of the plant. The endodermis is found between the cortex and the vascular tissue. The epidermis produces the outer boundary between the plant and the external environment. The main difference between endodermis and epidermis is that endodermis is an inner cell layer whereas epidermis is the outermost layer of cells. The endodermis consists of tightly packed, single layer of cells. It separates the vascular tissues from the cortex. The epidermis is a thick single layer of cells. It is also called the cuticle and protects the plant from water loss and allows gas exchange. 

Answer 2

Epidermis is made up of single layer of closely packed living cells. Most of the time, the walls of epidermal cells are thick and are covered with thick layer called as cuticle. In some structures, epidermal cells possess special outgrowths called as trichomes.

Functions of epidermis
*Epidermal cells protect underlying tissues.
*Cuticle prevents underlying cells from desiccation thus preventing water loss.
*Special structures called stomata present in the epidermal cells help in gaseous exchange and also in getting rid of excess water.

Endodermal cells lie in the region of cortex. It is the innermost layer of cortex. It  is also called as starch sheath. It is a single layer of tightly packed cells.

Functions of endodermis
*These endodermal cells store starch.
*Endodermal cells allow solutions to travel from vascular tissue to the cortex.