location in the stem function and Chemical Composition of th

location in the stem, function, and Chemical Composition of their Wall:

-Epidermis

-Periderm

-Xylem

- Phloem

- Parenchyma

- Collenchyma

- Sclerenchyma

Solution

Epidermis-

It is the single layer cell covering which makes the dermal tissue and covers the stem. It is the outermost layer of the primary plant body.

Function- regulates exchange of gases in plants, prevents the loss of water, and helps in secreting various metabolic compounds.

Chemical composition- hydrocarbon polymer impregnated with wax and lipids

Periderm-

Periderm is the corky outer layer of the stem. It is the secondary protective dermal tissue which replaces epidermis during the growth thickness of the stem. Periderm is the multilayer tissue system.

Function- Protects the stem from pathogen attack an dessication

Chemical composition- polysaccharides, tannins, biopolymers

Xylem-

Xylem is a type of transport tissue located in the vascular bundles.

Function-main function of xylem is to transport water from roots to shoots and leaves along with some important nutrients.

Chemical composition- hemicelluloses, ligin, cellulose, pectin

Phloem-

Phloem is the living tissue found in the vascular bundles of the plants. It is the innermost layer of the bark.

Function- the important function is to transport organic compounds formed during the process of photosynthesis.