Because it protects the growing root tip
Epithelial tissue
It seems to be a protective tissue.
vascular tissuedermal tissueground tissue
The periderm is the secondary protective (dermal) tissue that replaces the epidermis during growth in thickness of stems and roots of gymnosperms and dicotyledons (i.e., secondary growth). Unlike the epidermis, the periderm is a multilayered tissue system, the bulk of which usually constitutes the cork, or phellem.
Fibrous tissue, vascular tissue, and retina
Protective tissue can be found on the outermost layer of a plant. This tissue is covered with cutin and protects underlying tissues within the plant.
Protective tissue
Protective tissue
Cork is the outer protective tissue of older stems and roots. The mature cork cells become dead and filled with tannis, resins and air.
Phloem and xylem tissue carries material from a plant's roots to its leaves.
The protective tissue
Epithelial tissue
Xylem tissue carries material from a plant's roots to it's leaves
Lateral roots are extentions out of the pericycle.
It seems to be a protective tissue.
Ephithelial tissue
rhizoids